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

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

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

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

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