Every evening, Blackie would be waiting for Alan to come back from school. Blackie was always very happy to see Alan. He would greet Alan with a woa woa and a wagging tail. Blackie was a dog and Alan was his master. Blackie liked to play with Alan. 

One evening when Alan returned from school, there was no woa woa and a wagging tail. Blackie was missing. Early the next morning, Alan and his brother and two sisters went to look for Blackie. They walked and searched ... shouting "Blackie, Blackie!" They walked and searched from morning to evening ... shouting "Blackie, Blackie!" But there was no woa woa and a wagging tail. The children were very sad and tired. 

One day, the children heard a woa woa coming from a house. It sounded like Blackie. The children ran to the house and rang the bell. A man opened the door. The children asked, "Uncle, have you seen a black dog?" The man replied, "No." But the children could still hear a woa woa coming from the house.