[0,0,1,0,1,2,0,2,1,0,1,2,3,0,3,2,1,0,1,2,3,4,0,4, 3,2,1,0,1,2,3,4,5,0,5,4,3,2,1,0,1,2,3,4,5,6,0,6,5, 4,3,2,1,0,1,2,3,4,5,6,7,0,7,6,5,4,3,2,1,0,1,2,3,4, 5,6,7,8,0,8,7,6,5,4,3,2,1,0,1,2,3,4,5,6,7,8,9,0,9, 8,7,6,5,4,3,2,1]