[1,1,2,2,3,4,4,5,6,6,7,8,8,9,10,11,11,12,13,13,14, 15,16,16,17,18,18,19,20,21,21,22,23,24,24,25,26, 27,27,28,29,30,30,31,32,33,33,34,35,36,37,37,38, 39,40,40,41,42,43,43,44,45,46,47,47,48,49,50,50, 51,52,53,53,54]