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

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

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

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

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