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