[0,0,0,1,1,2,1,3,2,4,2,5,3,6,3,7,4,8,4,9,5,10,5, 11,6,12,6,13,7,14,7,15,8,16,8,17,9,18,9,19,10,20, 10,21,11,22,11,23,12,24,12,25,13,26,13,27,14,28, 14,29,15,30,15,31,16,32,16,33,17,34,17,35,18,36, 18,37,19,38,19,39]