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