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

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

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

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

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