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

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

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

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

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