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