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

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

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

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

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