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