X ( 1 , 35 , 2 , 34 ) X ( 6 , 30 , 7 , 29 ) X ( 7 , 53 , 8 , 52 ) X ( 8 , 20 , 9 , 19 ) X ( 9 , 43 , 10 , 42 ) X ( 14 , 38 , 15 , 37 ) X ( 15 , 5 , 16 , 4 ) X ( 16 , 28 , 17 , 27 ) X ( 17 , 51 , 18 , 50 ) X ( 22 , 46 , 23 , 45 ) X ( 23 , 13 , 24 , 12 ) X ( 24 , 36 , 25 , 35 ) X ( 25 , 3 , 26 , 2 ) X ( 30 , 54 , 31 , 53 ) X ( 31 , 21 , 32 , 20 ) X ( 32 , 44 , 33 , 43 ) X ( 33 , 11 , 34 , 10 ) X ( 38 , 6 , 39 , 5 ) X ( 39 , 29 , 40 , 28 ) X ( 40 , 52 , 41 , 51 ) X ( 41 , 19 , 42 , 18 ) X ( 46 , 14 , 47 , 13 ) X ( 47 , 37 , 48 , 36 ) X ( 48 , 4 , 49 , 3 ) X ( 49 , 27 , 50 , 26 ) X ( 54 , 22 , 55 , 21 ) X ( 55 , 45 , 56 , 44 ) X ( 56 , 12 , 1 , 11 ) {\displaystyle X(1,35,2,34)X(6,30,7,29)X(7,53,8,52)X(8,20,9,19)X(9,43,10,42)X(14,38,15,37)X(15,5,16,4)X(16,28,17,27)X(17,51,18,50)X(22,46,23,45)X(23,13,24,12)X(24,36,25,35)X(25,3,26,2)X(30,54,31,53)X(31,21,32,20)X(32,44,33,43)X(33,11,34,10)X(38,6,39,5)X(39,29,40,28)X(40,52,41,51)X(41,19,42,18)X(46,14,47,13)X(47,37,48,36)X(48,4,49,3)X(49,27,50,26)X(54,22,55,21)X(55,45,56,44)X(56,12,1,11)}