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