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