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