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

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

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

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

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