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