$EXEC orbit (0,13,26)(1,9,3)(2,21,12)(4,18,7)(5,17,20)(6,11,10)(8,15,25)(14,16,22)(19,23,24)(27) (0,2,4,6,8,10,12,14,16,18,20,22,24)(1,3,5,7,9,11,13,15,17,19,21,23,25)(26)(27) (0,13)(1,12)(2,11)(3,10)(4,9)(5,8)(6,7)(14,25)(15,24)(16,23)(17,22)(18,21)(19,20)(26,27) .. 0000000100111000101111011011