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