[1,2,3,1,4,5,2,3,1,3,1,4,5,2,5,2,3,1,4,6,4,5,2,3, 7,8,9,1,7,8,6,4,5,9,10,11,2,3,1,9,10,7,8,6,11,12, 13,4,5,2,3,1,8,6,9,10,7,13,14,15,11,12,4,5,2,3,1, 10,11,12,6,9,1,7,8,13,14,15,16,4,5,2,3]