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

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

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

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

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