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