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