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