[0,1,2,2,3,3,4,4,5,6,6,7,7,8,9,9,10,10,11,12,12, 13,13,14,14,15,16,16,17,17,18,19,19,20,20,21,21, 22,23,23,24,24,25,26,26,27,27,28,28,29,30,30,31, 31,32,33,33,34,34,35,36,36,37,37,38,38,39,40,40, 41,41,42,43,43,44,44,45,45,46,47,47]