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