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