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