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

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

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

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

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