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