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