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