refactor: Simplify suffix extraction
refactor: Simplify suffix extraction

Bugfry/exercises,Bugfry/exercism,Bugfry/exercism,Bugfry/exercises,Bugfry/exercism,Bugfry/exercises,Bugfry/exercism,Bugfry/exercism,Bugfry/exercism,Bugfry/exercises,Bugfry/exercises,Bugfry/exercises