[1,2,1,3,4,5,2,6,7,3,8,9,10,4,11,12,13,5,14,15,6,16,17,18,7,19,20,8,21,22,23,9,24,25,26,10,27,28,11,29,30,31,12,32,33,34,13,35,36,14,37,38,39,15,40,41,16,42,43,44,17,45,46,47,18,48,49,19,50,51,52,20,53,54,21,55]