18 cubes, 6 stacks of 2, 1 stack of 1, 1 stack of 5
5- 2
4- 5
3- 8
2- 3
1- 0
0- 0
Stack 4 and stack 5 (from the left) do not share any sides. Keep in mind that you cannot assume that there will be a block between the two two block towers. If there is no seen top block, then there is no stack in that row. IMHO for PAT you should really master cube counting and pattern folding to the point where your consistently scoring 29-30 out of 30 each time that you do a section.