[0,1,2,3,2,4,5,4,6,4,7,6,5,4,5,8,9,8,10,8,11,10,9, 8,9,12,8,13,12,9,8,9,14,12,10,8,10,15,14,13,12,13, 11,10,11,9,11,8,9,10,11,16,17,16,18,16,19,18,17, 16,17,20,16,21,20,17,16,17,22,20,18,16,18,23,22, 21,20,21,19,18]