Declension of the word "Öffnungsfehler"

Singular and plural for Öffnungsfehler, m, strong declension     

Singular
Plural
Singular
Nominativ (Wer? Was?)
der Öffnungsfehler
die Öffnungsfehler
Genitiv (Wessen?)
des Öffnungsfehlers
der Öffnungsfehler
Dativ (Wem?)
dem Öffnungsfehler
den Öffnungsfehlern
Akkusativ (Wen? Was?)
den Öffnungsfehler
die Öffnungsfehler
Plural
die Öffnungsfehler
der Öffnungsfehler
den Öffnungsfehlern
die Öffnungsfehler
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