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