5a 3a 9 3 July 8, 2019 16 32 64 128 2 a 2-5a-3/3a-9 12 3a 3 9 5a 3a 5b 9 5a 3b 7 3a 5b 9 5a 3b 7 a b 5 3a 9 3a 5 a 3