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