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