X 0 2 July 8, 2019 16 32 64 128 X 0 2x 8 15 X 0 2 4 X 0 2 3 X 0 2 1 X 0 2 6 X 0 2 8 X 0 2x 3 X 0 2 y X 0 2 7 X 0 2 10 X 0 2 3 4