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

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

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

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

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