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

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

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

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

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