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