[1,2,0,3,4,0,5,6,0,7,8,0,9,10,0,11,12,0,13,14,0, 15,16,0,17,18,0,19,20,0,21,22,0,23,24,0,25,26,0, 27,28,0,29,30,0,31,32,0,33,34,0,35,36,0,37,38,0, 39,40,0,41,42,0,43,44,0,45,46,0,47,48,0,49,50,0, 51,52,0,53,54,0]