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

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

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

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

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