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

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

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

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

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