'Twas brillig, and the slithy toves did gyre and gimble in the wabe

If you wanna be slightly abstract about it, a lowercase O is half an A, B, D, G, P, or Q, depending on where and how you attach the line bit next to it, and a C is half an O or S (or an E, I guess)! Lowercase L is half a lowercase K or T (maybe two-thirds if you wanna be picky about it); I is about half a J; V is the top half of X or Y, or one of the side halves of W; and R is the beginning part of M and N, while N itself is the bottom half of H.

I can't account for F, U, or Z, but I tried. :D;