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

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

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

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

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