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