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

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

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

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

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