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