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