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Jack Oddboy:- My teacher's no sense of humour.
Aunt Katherine:- What makes you think that?
J.O:- Why the other day in a geography lesson she said:
"Jack, why haven't you found Timbuctoo on the map?"
So I said: "Because I can't find Timbuc-one yet!"
A.K:- Well?
J.O:- She got cross with me. She can't see a joke.