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