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