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

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

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

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

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