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