[1,2,5,6,8,9,10,11,12,14,15,16,17,18,20,21,22,23, 24,26,27,28,29,30,32,33,34,35,36,37,38,40,41,42, 44,45,46,47,49,50,51,52,53,54,55,56,57,58,59,60, 61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76, 77,78,79,80,81]