ff2a 3 22  3 0  0 1 1 0 1 0 0
ff2a 4 15  4 0  1 1 1 1 0 0 0
ff2a 4 58  4 0  0 1 0 1 1 1 0
ff2b 6 63  6 0  1 1 1 1 1 1 0
