$EXEC orbit
(0,1,13,2,16,14,6,3,8,17,12,15,5,7,11,4,10,9,18)
(0,2,4,6,8,10,12,14,16)(1,3,5,7,9,11,13,15,17)
(0,9)(1,8)(2,7)(3,6)(4,5)(10,17)(11,16)(12,15)(13,14)(18,19)
..
11111110000011010000
11111110101010000000
11111110100001000010
11111110110100000000
11111111010000010000
11111110010010100000
11111110010001000100