(0 20 7)(1 15 5)(2 18 4)(3 8 6)(9 13 11)(10 19 17)(12 16 14)
ALLOWS (11/8)-SEQUENCE
1: (2 18 20)
(0 20 4 2 7)(1 15 5)(3 8 6)(9 13 11)(10 19 17)(12 16 14)(18)
2: (0 2 7)
(0)(1 15 5)(2 20 4)(3 8 6)(7)(9 13 11)(10 19 17)(12 16 14)(18)
3: (1 15 5)
(0)(1)(2 20 4)(3 8 6)(5)(7)(9 13 11)(10 19 17)(12 16 14)(15)(18)
4: (3 8 6)
(0)(1)(2 20 4)(3)(5)(6)(7)(8)(9 13 11)(10 19 17)(12 16 14)(15)(18)