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