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