(0 20 18)(1 12 6 4 3)(2 21 13 7 5)(8 11 9)(10 16 14)(15 19 17)
ALLOWS (11/8)-SEQUENCE
1: (0 4 12)
(0 6 4 20 18)(1 12 3)(2 21 13 7 5)(8 11 9)(10 16 14)(15 19 17)
2: (2 21 5)
(0 6 4 20 18)(1 12 3)(2)(5 13 7)(8 11 9)(10 16 14)(15 19 17)(21)
3: (4 20 6)
(0 6 18)(1 12 3)(2)(4)(5 13 7)(8 11 9)(10 16 14)(15 19 17)(20)(21)
4: (5 13 7)
(0 6 18)(1 12 3)(2)(4)(5)(7)(8 11 9)(10 16 14)(13)(15 19 17)(20)(21)