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

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

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

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

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