1,2,3,4,12,13,14,15,28,29,30,31,32,36,39,40,41,42,47,48,49,51,
7,8,9,18,19,20,33,37,38,50,sa,
25,26,27,34,35,wa,
5,6,16,17,23,24,
10,11,21,22,aa,