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

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

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

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

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