Склонение слова OPER
                    - Немецкий
                
            Feminine
                                    Singular
                                                
    
                        die
            Oper
nominative
                                                                                                                                                                                                                                                                                        
nominative
    
                        der
            Oper
genitive
                                                                                                                                                                                                                                                                                        
genitive
    
                        der
            Oper
dative
                                                                                                                                                                                                                                                                                        
dative
    
                        die
            Oper
accusative
                                                                                                                                                            accusative
Plural
                                                
    
                        die
            Opern
nominative
                                                                                                                                                                                                                                                                                        
nominative
    
                        der
            Opern
genitive
                                                                                                                                                                                                                                                                                        
genitive
    
                        den
            Opern
dative
                                                                                                                                                                                                                                                                                        
dative
    
                        die
            Opern
accusative
                                                                                                                                                            accusative