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

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

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

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

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