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

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

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

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

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