X ( 1 , 19 , 2 , 18 ) X ( 2 , 36 , 3 , 35 ) X ( 3 , 53 , 4 , 52 ) X ( 7 , 25 , 8 , 24 ) X ( 8 , 42 , 9 , 41 ) X ( 9 , 59 , 10 , 58 ) X ( 13 , 31 , 14 , 30 ) X ( 14 , 48 , 15 , 47 ) X ( 15 , 65 , 16 , 64 ) X ( 19 , 37 , 20 , 36 ) X ( 20 , 54 , 21 , 53 ) X ( 21 , 5 , 22 , 4 ) X ( 25 , 43 , 26 , 42 ) X ( 26 , 60 , 27 , 59 ) X ( 27 , 11 , 28 , 10 ) X ( 31 , 49 , 32 , 48 ) X ( 32 , 66 , 33 , 65 ) X ( 33 , 17 , 34 , 16 ) X ( 37 , 55 , 38 , 54 ) X ( 38 , 6 , 39 , 5 ) X ( 39 , 23 , 40 , 22 ) X ( 43 , 61 , 44 , 60 ) X ( 44 , 12 , 45 , 11 ) X ( 45 , 29 , 46 , 28 ) X ( 49 , 1 , 50 , 66 ) X ( 50 , 18 , 51 , 17 ) X ( 51 , 35 , 52 , 34 ) X ( 55 , 7 , 56 , 6 ) X ( 56 , 24 , 57 , 23 ) X ( 57 , 41 , 58 , 40 ) X ( 61 , 13 , 62 , 12 ) X ( 62 , 30 , 63 , 29 ) X ( 63 , 47 , 64 , 46 ) {\displaystyle X(1,19,2,18)X(2,36,3,35)X(3,53,4,52)X(7,25,8,24)X(8,42,9,41)X(9,59,10,58)X(13,31,14,30)X(14,48,15,47)X(15,65,16,64)X(19,37,20,36)X(20,54,21,53)X(21,5,22,4)X(25,43,26,42)X(26,60,27,59)X(27,11,28,10)X(31,49,32,48)X(32,66,33,65)X(33,17,34,16)X(37,55,38,54)X(38,6,39,5)X(39,23,40,22)X(43,61,44,60)X(44,12,45,11)X(45,29,46,28)X(49,1,50,66)X(50,18,51,17)X(51,35,52,34)X(55,7,56,6)X(56,24,57,23)X(57,41,58,40)X(61,13,62,12)X(62,30,63,29)X(63,47,64,46)}
