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