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

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

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

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

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