Me: Knock, knock.
Other person: Who’s there?
Me: Atch.
Other person: Atch who?
Me: Bless you!
Me: Knock, knock.
Other person: Who’s there?
Me: Atch.
Other person: Atch who?
Me: Bless you!
Knock knock.
Who's there?
Atch.
Atch who?
Sorry you are sneezing. Have you got a cold?