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