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

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

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

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

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