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