2 6 7 1 2 7 July 8, 2019 16 32 64 128 2 6 7 1 3 7 2 6 7 1 5 7 2 6 7 1 4 7 2 1 2 x 6 7 x 7 8 6 7x 1 2 7 8 6 2 7 plus 7 1 2
