[1,3,7,6,5,11,10,9,17,16,15,14,13,23,22,21,20,19, 31,30,29,28,27,26,25,39,38,37,36,35,34,33,49,48, 47,46,45,44,43,42,41,59,58,57,56,55,54,53,52,51, 71,70,69,68,67,66,65,64,63,62,61,83,82,81,80,79, 78]