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