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