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