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