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

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

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

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

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