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