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

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

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

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

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