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