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