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