SN2'd first day

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TexasSurgeon

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EDIT: This was supposed to be a thread about the first day of SN2. However as with all intelligent life, things evolve. This thread has now become a support page for people following the SN2 plan. You can think of it as Alcoholics Anonymous for people studying to take the MCAT using the SN2 plan.

EDIT July 1, 2014:
If you are interested in @mehc012's Anki Deck, DO NOT SEND A PM. Here is the link: https://www.dropbox.com/s/7if6wgaif98rkoa/mehc012 SN2edCh4s.apkg
**A NOTE: @mehc012 and several others (myself included) want to tell you guys that studying from another person's deck will probably not be as beneficial to you as creating your own cards. Yes you can take advantage of @mehc012's generosity, but you won't get the same advantage. Study the material. Create cards as you go along. You will find it more helpful to your studying. **

EDIT July 22, 2014:
The following is @TBRBiosadist's official MCAT Verbal Reasoning Strategy:
@TBRBiosadist's strategy that got [him] from a 7 average to scoring 13-15 average..

Spend the bulk of your time reading. Up to 3 minutes per passage.
  • Read the first and last paragraph thoroughly to begin with. Understand what the authors main point will be because 90% of questions require nothing more than a general idea.
  • After this, read the entire passage slowly enough where you dont feel like you need to reread sentences for understanding.
Next is just answer questions, there is a few tricks here that work about 90% of the time
  • Unless the passage is asking you about a specific detail, dont look back. READ EVERY ANSWER THOROUGLY AND THEN Answer what makes sense from the general point of the passage. Its very easy to prove a wrong answer to be somewhat correct if you dig hard enough, dont. Answer what your gut says and move onto the next question, dont contemplate to much. With that being said...
  • Answer like you were dropped on the head as a child. Alot of times if Im arguing between two answers, there is the answer that is 100% correct, and one that is 90% correct. Be an idoit and choose the one that seems like it is correct. However.....
  • "Always" is a word to avoid. If an answer uses this word, or definites like it, it is something to avoid. I would say 80% of the time the wishy washy answer is more correct then the highly affirmative one. This leads to my final point....
  • 100% of the time you are not actually looking for the "right" answer in verbal, this isnt PS or BS where 1+1 almost always equals 2 (unless we are talking about the different sedimentation values for Ribosomes). In verbal you are looking for the answer that isnt wrong. Often times an answer will seem very "right" but one aspect of it is clearly wrong, as compared to an answer that isnt wrong, but doesnt seem as right as that answer, these are meant to fool you. Choose the answer that isnt wrong.
I understand that I few of these tips may be at odds with each other. Ultimately you must adjust slightly for each passage, but it comes down to one thing. Read thoroughly. Read every sentence in the passage. Read every question. Read every answer. Then the correct answer will be fairly obvious. This may seem like it takes longer, but it takes much less time than skimming, and then trying to find the correct information later.

Or to summarize in one sentence

Understand what the hell the author is arguing

EDIT July 26, 2014:

@DoctorInASaree uploaded a guide to Verbal Reasoning. If you're interested, it's worth a look. Here is the link: https://www.dropbox.com/s/2byivymmqwlvjms/MCAT VR Primer DRSAREE.pdf

EDIT 2, July 26, 2014: http://forums.studentdoctor.net/threads/sn2d-first-day.1074344/page-52#post-15510851
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Just finished the first day of SN2...man is it long and exhausting.

The first day is BR physics chapter (translational motion) + 1/3 of the passages. I felt like I wasn't able to apply the stuff I read into the stuff I was tested on.

Has anyone felt this way when following the schedule? It just seems like the contents of the chapter didn't really stick in my head when I took the practice passages. Will this improve over time?

EDIT 3, March 4, 2015:

For verbal, if you are feeling lost and confused, I highly highly recommend you to look into the MCAT Strategy Course by @Jack Westin. I've been working with him, and nothing comes close to his course and teaching. It's a strategy course, so it will cover everything, not just the VR/CARS section.
 
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Hold the phone. Im seeing lotsa 100% in tbr bio! those are some good scores. Albeit you are obviously really awesome in somethings, others not so much. But that ch 8 bio 57%-->100% thats some impressive stuff

I'm using EK for Bio. For Chapter 8 and 9 each 1/3 is one passage. So, I did bad on one and good on one. Hah
 
Color coded!!!!
Is that conditional formatting I see? :biglove:

Also, wow, that's a lot of 100%s! I never get those (seriously, not even once yet 🙁 ) You also seem to pretty consistently improve on consecutive ⅓'s...keep up the good work! :highfive:

Conditional formatting indeed!

Yea, I do, so that makes me feel comfortable that I have absorbed and learned from past mistakes. My orgo average is the lowest, yet on each AAMC I usually get 95-100% correct. So the TBR passages must definitely be harder than AAMC. My overall average is like 75% on TBR and 90% on AAMC...
 
Color coded!!!!
Is that conditional formatting I see? :biglove:

Also, wow, that's a lot of 100%s! I never get those (seriously, not even once yet 🙁 ) You also seem to pretty consistently improve on consecutive ⅓'s...keep up the good work! :highfive:
 
Nice job! I'm thinking about taking practice tests right now but i'm only halfway through content review. I was thinking I would take one test every week and review the stuff in was weak on in those areas and keep going from there

I didn't really deviate from the schedule.
 
I'm doing all the exams in 3 weeks. I don't need 2 days to review the exam and do the last 1/3. I can do that in a day.


How do you think you are going to review your exams?
Like make notes of the topics you got wrong, content review, practice problems?

I am trying to think ahead because I don't think I'll have enough practice material to do extra problems on topics I got wrong... unless I re-do TPRH...hmm #reasourceproblems.
 
How do you think you are going to review your exams?
Like make notes of the topics you got wrong, content review, practice problems?

I am trying to think ahead because I don't think I'll have enough practice material to do extra problems on topics I got wrong... unless I re-do TPRH...hmm #reasourceproblems.

I'm taking notes on everything I missed. Then looking at the charts and seeing which subjects I did bad on and reviewing those. TPRH, you already did TPR? You added TPR to this schedule? I guess you could do the three quizzes within EK and the 30 min exam for that chapter.
 
hey guys ... long time
But you people are getting me motivated again after being sluggish the past 2 weeks,
and WOW those are some scores, Day 36 for me yet I can't manage to get those 100% like i get a full shot on one passage then manage to miss a couple on another.
I started using color coding for my mistakes, I use colored flags with every color for a type of mistake, and I am starting to realize a trend that most of my mistakes would be missing a trick or a word in the question DARN.
Been missing verbal passages for quite some time now need to get down to them again.
How do you guys feel with recalling tips and tricks from old chapters. does someone feel they are getting rusty ?
 
TPR chemistry online passages have me going :smack:

General Feedback:Your General Chemistry skills are getting stronger! Keep working at it! #LIAR :shrug:
 
TPR chemistry online passages have me going :smack:

General Feedback:Your General Chemistry skills are getting stronger! Keep working at it! #LIAR :shrug:

Keep going! You can do it! You may even get this free awesome pin:

chemistry_wizard_stickers-r1dc02a5e4f3e41378393f442a9329878_v9waf_8byvr_512.jpg
 
Home from work. Goal for the day:
Anki
Orgo 5 passages
Read/make cards for Bio 5
Review + reread + EK Chem 5
Begin reading/making cards for Bio 6
3 VR passages

I'm pretty pumped about my Anki deck - 1700+ cards with 96% retention thus far! Hey, at least I score higher there than on TBR...
Sadly, my long-term Review deck, with all of my non-MCAT related cards, has fallen by the wayside. I am now 560 cards behind on my reviews there :/
It'll only take an hour or so to review them all, but I know that my stats will plummet for a while after I do so - you always forget a lot more when you've been neglecting a deck. It's how Anki reminds you that it is far better at scheduling your learning than you are.
 
Hmmm im starting to get the impression that I should start using anki. I would like to revise an earlier statement. Now that I am reviewing it, the Nitrogen Compound chapter in Ochem is ridiculous, especially near the end.
 
Finished physics chapter 5. Got 10/18 on the 1/3 passages for the 7 passage exam thing at the end. ARGHHHH I HATE YOU PHYSICS! I REALLY hope physics isn't this bad as on the actual mcat!

Did anybody using TBR regularly score between 50-60% on passages and end up with atleast a 9-10 on the real thing??


🙁 <--- that's me right now
 
Finished physics chapter 5. Got 10/18 on the 1/3 passages for the 7 passage exam thing at the end. ARGHHHH I HATE YOU PHYSICS! I REALLY hope physics isn't this bad as on the actual mcat!

Did anybody using TBR regularly score between 50-60% on passages and end up with atleast a 9-10 on the real thing??


🙁 <--- that's me right now

Physics is fun. I remember in high-school my physics teacher would tell a story during the test. Kin and Axela (kinematics/acceleration 😀) were the heroes. They married in the end after defeating the evil anti-Physics Overlord Deceleration (it's negative acceleration people!).:flame:

I remember I scored ~60% in the first chapter of Physics, but now I'm scoring 90%+. I hope you get used to TBR!🙂
 
Hmmm im starting to get the impression that I should start using anki. I would like to revise an earlier statement. Now that I am reviewing it, the Nitrogen Compound chapter in Ochem is ridiculous, especially near the end.
Nah, I'm just a staunch advocate of it; I switched to an Anki-only study strategy when I began my postbacc as a part of reinventing myself as a student. I wanted the ability to make my learning long-term rather than binge-learn, regurgitate, forget, binge again later...especially after reading so many med students lamenting that they do this in med school. I've never been a great student before - rarely studied other than cramming - and realized that my retention of facts was remarkably cruddy. I wanted to fix that, so I picked Anki, since I didn't have any underlying study habits to build from anyway, and built my style around it.
You'd think they pay me considering how frequently I recommend it to SDNers, but alas, no such luck for my wallet :laugh:
It takes a while to really use it efficiently, so if you're already not using it at this point in your content review, you might want to pick some key memorization-heavy areas to use it with and stick to just those. At this point, you're not going to make a comprehensive MCAT deck (which is my goal) and depending on how you make cards, trying to Anki everything could take longer than your current strategy.
 
Physics is fun. I remember in high-school my physics teacher would tell a story during the test. Kin and Axela (kinematics/acceleration 😀) were the heroes. They married in the end after defeating the evil anti-Physics Overlord Deceleration (it's negative acceleration people!).:flame:

I remember I scored ~60% in the first chapter of Physics, but now I'm scoring 90%+. I hope you get used to TBR!🙂

Wowsersss. tell me HOW! I MUST KNOW! 🙂))))
 
Nah, I'm just a staunch advocate of it; I switched to an Anki-only study strategy when I began my postbacc as a part of reinventing myself as a student. I wanted the ability to make my learning long-term rather than binge-learn, regurgitate, forget, binge again later...especially after reading so many med students lamenting that they do this in med school. I've never been a great student before - rarely studied other than cramming - and realized that my retention of facts was remarkably cruddy. I wanted to fix that, so I picked Anki, since I didn't have any underlying study habits to build from anyway, and built my style around it.
You'd think they pay me considering how frequently I recommend it to SDNers, but alas, no such luck for my wallet :laugh:
It takes a while to really use it efficiently, so if you're already not using it at this point in your content review, you might want to pick some key memorization-heavy areas to use it with and stick to just those. At this point, you're not going to make a comprehensive MCAT deck (which is my goal) and depending on how you make cards, trying to Anki everything could take longer than your current strategy.

All aboard the Anki train! :soexcited:

#teamanki
 
Any of you guys have trouble with this. I was doing some passages and one of the questions showed an equation with 3 moles on the left side and 2 moles on the right side in a chamber and asked that if you added 0.1 moles to the left side what would happen to the volume. I answered volume should go down, because the reaction will go forward to the less moles side. But no, the answer was that it will go up because you added 0.1 moles.....

I felt the question was assuming that the 0.1 moles had already been added and wanted to know what happens next. I have had this issue on several questions. Any others experience this at all or feel that some questions are ambiguous?
 
Any of you guys have trouble with this. I was doing some passages and one of the questions showed an equation with 3 moles on the left side and 2 moles on the right side in a chamber and asked that if you added 0.1 moles to the left side what would happen to the volume. I answered volume should go down, because the reaction will go forward to the less moles side. But no, the answer was that it will go up because you added 0.1 moles.....

I felt the question was assuming that the 0.1 moles had already been added and wanted to know what happens next. I have had this issue on several questions. Any others experience this at all or feel that some questions are ambiguous?
It would be far easier if you'd post the question # so we can look at it...but then of course, you risk spoiling other members of the thread. Maybe post a thread (with the appropriate title to avoid accidental spoilers) in the MCAT Q&A forum and then put the link here so we can know to go look?
 
It would be far easier if you'd post the question # so we can look at it...but then of course, you risk spoiling other members of the thread. Maybe post a thread (with the appropriate title to avoid accidental spoilers) in the MCAT Q&A forum and then put the link here so we can know to go look?

Yea most of you guys haven't gotten there yet and I was changing things up so that you don't 'cheat', like, you know what I mean.

I'll post the question up but change things up but use the same wording later.
 
On the note of questions. Anyone (who is there) a few of the questions for Gchem Ch9 (thermodynamics) a bit tricky?
 
46 and 47. And I botched some of the heat engine/refigeration graphs because I didnt pay enough attention. I understand why i was wrong and my mistakes for all of them. But I still can't see myself ever getting 46 right outside of a guess.
 
OK here it is, but slightly modified:

2CO + O2 <-> 2CO2 is reacted in a closed piston system with constant external pressure on the piston. What occurs with 0.1 atm of CO is added?

A) Volume decreases
B) Volume increases
C) Doesn't matter
D) Doesn't matter
 
OK here it is, but slightly modified:

2CO + O2 <-> 2CO2 is reacted in a closed piston system with constant external pressure on the piston. What occurs with 0.1 atm of CO is added?

A) Volume decreases
B) Volume increases
C) Doesn't matter
D) Doesn't matter

A. Pressure is inversely related to volume. Equilibrium shifts towards the right.

Edit: Choose B for some strange reason...clearly ran opposite to my line of thinking. Sleeep!

Edit #2: I'm not sure what your example has to do with your original question. That question dealt with change in moles, and the one you provided above deals with change in pressure. A possible answer to your earlier question: when the volume is increased the change occurs in the direction that produces more moles of gas. 3>2. That's why the change occurred on the LS and NOT the RS. (hence the incorrect answer). Hope that helps! 🙂
 
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OK here it is, but slightly modified:

2CO + O2 <-> 2CO2 is reacted in a closed piston system with constant external pressure on the piston. What occurs with 0.1 atm of CO is added?

A) Volume decreases
B) Volume increases
C) Doesn't matter
D) Doesn't matter
That's a terrible example. There is no wishy washy answer that says that it can be either A or B depending on the cycle of the moon, which you have of course memorized because it was mentioned in the fine print once.
 
A. Pressure is inversely related to volume. Equilibrium shifts towards the right.

Edit: Choose B for some strange reason...clearly ran opposite to my line of thinking. Sleeep!

See my confusion is. The question asking what happens to the volume after 0.1 atm is added. If the 0.1 atm is already added then the 0.1 atm is already there and the equilibrium will shift to the right towards the side with lower moles. So we started with 0.1 atm added and it will go to the side with lower moles meaning that there will be less than 0.1 atm that was initially added meaning that it the volume will decrease. OR has the 0.1 atm not been added yet then obviously the answer is B.
 
That's a terrible example. There is no wishy washy answer that says that it can be either A or B depending on the cycle of the moon, which you have of course memorized because it was mentioned in the fine print once.

Wait...is the example terrible or is the question terrible.
 
OK here it is, but slightly modified:

2CO + O2 <-> 2CO2 is reacted in a closed piston system with constant external pressure on the piston. What occurs with 0.1 atm of CO is added?

A) Volume decreases
B) Volume increases
C) Doesn't matter
D) Doesn't matter


I think maybe were confusing two different concepts here..
According to pg 180 in TBR if you increase volume (i.e that is your stress) it will shift to the side with the greater number of moles.
But this question is just asking if I have a system and I add more gas what is going to happen? the volume would increase right?

I might be wrong but that's how I reasoned it. 😀
 
I think maybe were confusing two different concepts here..
According to pg 180 in TBR if you increase volume (i.e that is your stress) it will shift to the side with the greater number of moles.
But this question is just asking if I have a system and I add more gas what is going to happen? the volume would increase right?

I might be wrong but that's how I reasoned it. 😀

Yes, so I know that volume will increase, of course, you are adding 0.1 atm of CO, which increases pressure, which forces the reaction in the forward direction (side with less moles) you are also adding a reactant which pushes the reaction forward because of l'chatlier. So I know the concept here. But when the question asks "What occurs with 0.1 atm of CO is added?" Has the CO already been added then I want to know happens? So if there was 1 atm pressure to start with, we add the 0.1 atm, pressure goes up then volume goes up (pressure goes down), the reaction proceeds, CO gets used, reaction goes to the right side with less moles, pressure goes down, volume goes down. In the reaction the volume will go up initially, then it will drop from the increased point, so the volume is essentially increasing and decreasing.

Maybe it's just me, but my confusion is that, was the 0.1 atm already added? If it was already added then the volume decreases.

I guess if they added the word 'net' to the question it would have made it clearer to me...
 
Yes, so I know that volume will increase, of course, you are adding 0.1 atm of CO, which increases pressure, which forces the reaction in the forward direction (side with less moles) you are also adding a reactant which pushes the reaction forward because of l'chatlier. So I know the concept here. But when the question asks "What occurs with 0.1 atm of CO is added?" Has the CO already been added then I want to know happens? So if there was 1 atm pressure to start with, we add the 0.1 atm, pressure goes up then volume goes up (pressure goes down), the reaction proceeds, CO gets used, reaction goes to the right side with less moles, pressure goes down, volume goes down. In the reaction the volume will go up initially, then it will drop from the increased point, so the volume is essentially increasing and decreasing.

Maybe it's just me, but my confusion is that, was the 0.1 atm already added? If it was already added then the volume decreases.

I guess if they added the word 'net' to the question it would have made it clearer to me...

Initial pressure is irrelevant. The only relevant piece of information needed to answer the question is that 0.1 atm is added (and the number of moles). Pressure doesn't increase - it's at level x1 initially, and volume is at y1 initially. Now I add 0.1atm to that level x1 [call it x2 now]; therefore volume y2 is less than volume y1 irrespective of it's initial value. Yes, the volume decreases. See my answer in a previous post above for an explanation derived from Le Chatalier's principle. Aka, The Chandelier Principle.

Hope that adds an element of clarity to the discussion. 😀
 
Initial pressure is irrelevant. The only relevant piece of information needed to answer the question is that 0.1 atm is added (and the number of moles). Pressure doesn't increase - it's at level x1 initially, and volume is at y1 initially. Now I add 0.1atm to that level x1 [call it x2 now]; therefore volume y2 is less than volume y1 irrespective of it's initial value. Yes, the volume decreases. See my answer in a previous post above for an explanation derived from Le Chatalier's principle. Aka, The Chandelier Principle.

Hope that adds an element of clarity to the discussion. 😀

So, you're saying the answer is volume decreases? Right?
 
OK here it is, but slightly modified:

2CO + O2 <-> 2CO2 is reacted in a closed piston system with constant external pressure on the piston. What occurs with 0.1 atm of CO is added?

A) Volume decreases
B) Volume increases
C) Doesn't matter
D) Doesn't matter
Pressure is constant, so we are not discussing Le Chat in terms of "increased pressure → side with fewer mols"
If this system is in equilibrium, and you add .1atm of CO, some but not all of it will go to the right

Let's call #molCO in 0.1atm "y"
Assume the reaction then turned ALL of that added CO to CO2 (which it can't do). You would lose, at most 1.5ymols of gas (all added CO + half as much O2), and gain ymols of CO2. This cannot happen, because the new equilibrium will have a higher ppCO than before adding more

The net of the above line would be: (V0 + y) - 1.5y + y = Vf
Vf must be greater than Vo, even in the impossible case where all new CO → CO2 In reality, Vf = (V0+y) - 0.5z, where z<<y

Your pressure is the same
Final volume must be larger than Vo.
 
Pressure is constant, so we are not discussing Le Chat in terms of "increased pressure → side with fewer mols"
If this system is in equilibrium, and you add .1atm of CO, some but not all of it will go to the right

Let's call #molCO in 0.1atm "y"
Assume the reaction then turned ALL of that added CO to CO2 (which it can't do). You would lose, at most 1.5ymols of gas (all added CO + half as much O2), and gain ymols of CO2. This cannot happen, because the new equilibrium will have a higher ppCO than before adding more

The net of the above line would be: (V0 + y) - 1.5y + y = Vf
Vf must be greater than Vo, even in the impossible case where all new CO → CO2 In reality, Vf = (V0+y) - 0.5z, where z<<y

Your pressure is the same
Final volume must be larger than Vo.

OK I think my actual question is getting lost.

The answer is that the volume increases.

It's a closed piston system. Pressure does change, but equilibrates. Here is the answer from the book. When 0.1 atm is added the pressure will increase by 0.1 atm, then the piston will move up to equilibrate and increase the volume of the system. Because you now have more CO gas, the system will reestablish equilibrium by moving to the right. Since there are less moles on the right side, the pressure will decrease causing the volume to decrease, however not all of the CO will move to the right. So, the volume won't decrease all the way, and there is an overall slight increase in volume.

My problem is that basically, the question didn't say anything about net. I knew the volume was going up and then down. And I knew the net volume will increase too. But I made the assumption that the initial increase in volume had already occurred, that the 0.1 atm was already added. I was just saying, that sometimes I make errors like these and I feel that the questions at times are ambiguous and if any of you guys feel the same way. I never had any trouble with the material and concept itself.
 
OK I think my actual question is getting lost.

The answer is that the volume increases.

It's a closed piston system. Pressure does change, but equilibrates. Here is the answer from the book. When 0.1 atm is added the pressure will increase by 0.1 atm, then the piston will move up to equilibrate and increase the volume of the system. Because you now have more CO gas, the system will reestablish equilibrium by moving to the right. Since there are less moles on the right side, the pressure will decrease causing the volume to decrease, however not all of the CO will move to the right. So, the volume won't decrease all the way, and there is an overall slight increase in volume.

My problem is that basically, the question didn't say anything about net. I knew the volume was going up and then down. And I knew the net volume will increase too. But I made the assumption that the initial increase in volume had already occurred, that the 0.1 atm was already added. I was just saying, that sometimes I make errors like these and I feel that the questions at times are ambiguous and if any of you guys feel the same way. I never had any trouble with the material and concept itself.
Ah, got you. I was dealing only in nets, thus why I stated that pressure does not change (transient increase is irrelevant in my mind).
I always assume net unless told otherwise - they go into great detail to describe the starting setup, they change something, and they ask you about the final state. That's the basic format of the questions, so if it's ambiguous, go with that.

Usually, if they want to break it down into individual bits, they'll ask something like "just after the addition of gas, blah blah blah"

I do get your overall point though...I had one question today where the passage talked about two trials, each with 3 parts. Then a question asked about the slope in the third trial. So...do you want the third trial of Trial 1? What are you talking about?
 
Holy crap, this Bio chapter has 54 pages. Wat? How do they spend only 20p on Endocrine AND Immuno, and then 50 on protein folding and Golgi?
 
Gonna switch to TBR bio. Is it any good?
I was loving it until this one friggin' chapter (5)...
I've done all of the Physiology book, and I thought it was pretty good. I'm in Book 2 now, and thinking that perhaps this book could have used a few more chapters (not more info, more splitting) or something.
 
I would recommend more what I do which is take detailed notes from ek and skim tbr bio without taking notes. They really do give you to much to focus on for your own good
I don't think the Physio chapters were too much. If all of the Biomol chapters are like this one, THOSE might be a bit much, but the Physio was good.
 
I don't think the Physio chapters were too much. If all of the Biomol chapters are like this one, THOSE might be a bit much, but the Physio was good.


The second book is imo not supposed to be for content review but more so for passages and brushing up on topics.. I mean they go in SERIES detail into glycolysis/kreb pentose phosphate pathway fatty acid oxidation etc. I would use it as a reference. ALSO what I did was make flashcards of all the pathways like each step and on the back the enzyme associated with it. It's really good practice for those questions that ask you what enzyme converted G6phsphate to molecule X for example and you need tell by the structure. 🙂
 
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