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Father : What's the name of our PM ?
Son : We don't have PM in our Country.
Father (gets angry) : Shutup! Tell me the name of our PM.
Son : Okay dad, first you tell me the model no. of our type writer.
Father : We don't have typewriter !
Son : We have one in store-room.
Father : oh! ya... that one. We do have but that's not of any use, why should I remember it's model no.?
Son : This is what I answered before..