A man visited a psychiatrist to talk about his dream,"Every night," said the man, "I always dreamed that there were three very ferocious monster sitting on the side of my bed, and ready to attack me." "Hmm," said the psychiatrist."I'm very confident itcan resolve your problem. But this treatment will cost about 2000 to 3000 dollars." "3000 dollars!" he was shocked. "Well, it's gone, do not worry about those monsters againt. I think I'll go back to home and try to become friends of those monsters."