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