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