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