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