X ( 2 , 12 , 3 , 11 ) X ( 4 , 10 , 5 , 9 ) X ( 6 , 2 , 7 , 1 ) X ( 8 , 14 , 9 , 13 ) X ( 10 , 4 , 11 , 3 ) X ( 12 , 6 , 13 , 5 ) X ( 14 , 8 , 1 , 7 ) {\displaystyle X(2,12,3,11)X(4,10,5,9)X(6,2,7,1)X(8,14,9,13)X(10,4,11,3)X(12,6,13,5)X(14,8,1,7)}