[0,1,2,1,2,3,2,3,4,5,6,7,6,5,6,5,6,7,8,7,8,7,8,9, 8,9,8,7,8,9,8,9,10,9,10,11,12,11,10,11,12,11,10, 11,12,13,14,15,14,15,16,15,14,13,12,13,14,15,16, 17,16,15,16,17,18,17,16,15,16,15,16,15,16,17,16, 15,14,15,16,15]