*Explanation*= Some of the sides aren't given so you must look at the other side and put them in.
3+3 for the top and bottom 4+4 for both of the higher sides 2+2 for the first side of the sticking out square 0.5+0.5 for the sides of the sticking out square 2+2 for the last side of the sticking out square 4+4 for both of the lower sides