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