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

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

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

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

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