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