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