A dog has a piece of meat in his mouth. As he is ______________ on a small bridge, he looks down and ______________ himself in water. He thinks it is another dog. That dog also has a piece of meat in his mouth. He says to ______________, "I want to get his meat. Then I can have two pieces of meat." He opens his mouth to bark and his ______________ goes down into the water. At last, he has nothing. He is______________.