grind_rate = [ [ 100, 0, 0, 0, 0, 0, 0, 0, 0,], [ 38, 24, 24, 14, 0, 0, 0, 0, 0,], [ 35, 19, 19, 14, 9, 4, 0, 0, 0,], [ 33, 14, 14, 14, 9, 7, 5, 2, 2,],]