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