[0,1,2,0,4,5,0,7,8,0,10,11,0,13,14,0,16,17,0,19, 20,0,22,23,0,25,26,0,28,29,0,31,32,0,34,35,0,37, 38,0,40,41,0,43,44,0,46,47,0,49,50,0,52,53,0,55, 56,0,58,59,0,61,62,0,64,65,0,67,68,0,70,71,0,73, 74,0,76,77,0,79,80]