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

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

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

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

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