Add unique_informations() and handle missed corner case.
Add unique_informations() and handle missed corner case.

Autoplectic/dit,Autoplectic/dit,dit/dit,chebee7i/dit,chebee7i/dit,dit/dit,dit/dit,Autoplectic/dit,Autoplectic/dit,Autoplectic/dit,chebee7i/dit,chebee7i/dit,dit/dit,dit/dit