Declension of the noun Heroin,
m, strong declension 
heroin
Singular
Plural
Singular
Nominativ (Wer? Was?)
der Heroin
Genitiv (Wessen?)
des Heroines / Heroins
Dativ (Wem?)
dem Heroin / Heroine
Akkusativ (Wen? Was?)
den Heroin
Plural
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