1 2 6 b 6 8 2 July 8, 2019 16 32 64 128 A 1 2 3 4 5 6 b 2 4 6 8 find ab A 1 2 3 4 5 6 b 2 4 6 8 find ba 1 2+6 8 2 b 6 1/2b
