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

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

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

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

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