(0 20 18)(1 15 2)(3 21 14 11 5)(4 16 12 9 6)(7 10 8)(13 19 17)
ALLOWS (11/8)-SEQUENCE
1: (0 3 18)
(0)(1 15 2)(3 20 18 21 14 11 5)(4 16 12 9 6)(7 10 8)(13 19 17)
2: (14 18 21)
(0)(1 15 2)(3 20 18 11 5)(4 16 12 9 6)(7 10 8)(13 19 17)(14)(21)
3: (13 19 17)
(0)(1 15 2)(3 20 18 11 5)(4 16 12 9 6)(7 10 8)(13)(14)(17)(19)(21)
4: (11 20 18)
(0)(1 15 2)(3 20 5)(4 16 12 9 6)(7 10 8)(11)(13)(14)(17)(18)(19)(21)