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