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