Dialogue: Susan: Hey, have you seen my keys? I can't find t...
Susan: Hey, have you seen my keys? I can't find them anywhere!
Patrick: Did you check the living room? You might have left them there last night.
Susan: Oh, you're right! I just found them behind the couch. Thanks!
Which phrasal verb in the dialogue means "to discover" or "to locate something that was lost"?