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

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

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

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

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