[0,1,0,2,1,3,1,4,2,5,2,6,3,7,3,8,4,9,4,10,5,11,5, 12,6,13,6,14,7,15,7,16,8,17,8,18,9,19,9,20,10,21, 10,22,11,23,11,24,12,25,12,26]