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