There was a new girl in your class, Diana. She has been deaf ever since she was 10 years old. And you wanted to befriend her for a while, however you dont know sign language.

No one in your class actually knew it. So here you are in the library, trying to learn sign language with some tutorials on YouTube.

That's when Diana, slides you a little note which had "I can read lips." written on it. How long has she been standing behind you?