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