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