[0,2,1,4,6,3,8,5,10,12,7,14,9,16,11,18,20,13,22, 15,24,17,26,19,28,30,21,32,23,34,25,36,27,38,29, 40,42,31,44,33,46,35,48,37,50,39,52,41,54,56,43, 58,45,60,47,62,49,64,51,66,53,68,55,70,72,57,74, 59,76,61,78,63,80]