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