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