X ( 2 , 5 , 3 , 6 ) X ( 4 , 13 , 1 , 14 ) X ( 6 , 1 , 7 , 2 ) X ( 7 , 18 , 8 , 19 ) X ( 9 , 17 , 10 , 16 ) X ( 11 , 20 , 12 , 21 ) X ( 14 , 3 , 15 , 4 ) X ( 15 , 11 , 16 , 10 ) X ( 17 , 22 , 18 , 13 ) X ( 19 , 12 , 20 , 5 ) X ( 21 , 8 , 22 , 9 ) {\displaystyle X(2,5,3,6)X(4,13,1,14)X(6,1,7,2)X(7,18,8,19)X(9,17,10,16)X(11,20,12,21)X(14,3,15,4)X(15,11,16,10)X(17,22,18,13)X(19,12,20,5)X(21,8,22,9)}
