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