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

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

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

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

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