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