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

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

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

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

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