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