Input (grade 12): When he hears the pin is Susanna's, he is overcome with jealousy, especially as he recognises the pin to be the one that fastened the letter to the Count.
Output (grade 8): The Count is told to return the pin which fastens the letter. When he hears the pin is Susanna's, he is very jealous, especially as he recognises the pin to be the one that fastened the letter to the Count.