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