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