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

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

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

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

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