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