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

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

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

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

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