[0,1,1,2,1,3,2,3,1,4,3,4,1,5,4,5,3,5,2,5,1,6,5,6, 1,7,6,7,5,7,4,7,3,7,2,7,1,8,7,8,5,8,3,8,1,9,8,9,7, 9,5,9,4,9,2,9,1,10,9,10,7,10,3,10,1,11,10,11,9,11, 8,11,7,11,6,11,5,11,4,11,3,11,2,11,1,12,11,12,7, 12]