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

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

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

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

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