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