[0,1,2,1,2,3,4,2,4,5,6,3,4,7,4,5,6,8,9,6,9,10,11, 7,11,12,12,8,9,13,14,13,14,15,14,10,11,15,11,15, 16,16,17,16,17,18,19,17,19,19,18,18,19,20,19,20, 21,20,21,20,21,22,22,19,23,23,24,20,24,24,25,24, 25,26,26,25,27]