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