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