C d 2 3 July 8, 2019 16 32 64 128 C 3 2 d 3 6 1 c 2 d 3 a 4 b A b c d 2 3 A b c d 2 3 4 5 1 c 2 d 3 b D&c 38 2 C-d=2 3 C 2 d Cd 3 26
