b a x b a y 0 0 0 0 0 1 1 1 0 0 1 1 1 1 2 0 1 0 1 0 0 4 0 1 1 0 1 1 7 1 0 0 1 0 1 8 1 0 1 1 1 0 9 1 1 0 1 0 0 10 1 1 1 1 1 1