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

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

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

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

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