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

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

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

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

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