One day, a man with a big mustache went for a walk. He was very glad because it was a sunny day. He liked to whistle as he walked. His whistle was happy and loud.
As he walked, he met a dog. The dog liked the man's whistle. The dog said, "Can you teach me how to whistle?" The man with the big mustache said, "Sure, I can help you!"
The man showed the dog how to whistle. The dog tried and tried, but it was hard. Finally, the dog could whistle too. The man and the dog were very happy. They walked together, whistling and laughing. And they became the best of friends.
