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

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

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

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

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