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