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