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