Namely MAD, BRAIN, FOOL, NOBODY, SOMEBODY.
One day SOMEBODY killed NOBODY.
At that time BRAIN was in bathroom, MAD called police.
MAD : "Is it police station???"
Police: "Yes, what is the matter??"
MAD : "SOMEBODY killed NOBODY."
Police: "Are you mad?"
MAD : "Yes, I'm MAD."
Police: "Don`t you have BRAIN."
MAD : "BRAIN is in bathroom...."
Police: "You FOOL.!!!"
MAD : "No, Sir.. FOOL is reading this joke... "