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

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

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

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

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