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

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

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

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

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