n=50;
a=[41,29,19,46,13,28,47,17,45,4,34,14,37,7,30,24,27,9,11,15,50,8,39,32,3,42,10,16,31,6,1,43,21,36,2,23,26,49,33,12,40,35,22,48,5,25,20,18,44,38];
b=[43,13,32,28,41,3,8,20,37,22,40,34,33,24,47,21,39,14,17,6,18,50,19,26,45,44,9,30,42,1,35,49,15,5,23,16,29,27,36,38,2,25,46,48,7,31,4,11,10,12];