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

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

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

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

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