Tom was a very lazy boy when he was eleven years old. He didn't like doing anything. He had to go to school on weekdays, but he didn't study hard in the class and didn't do any homework after school. His father and mother were both doctors, and back then they hoped Tom could become a doctor, too. But one day, Tom said to his mother, "When I finish school, I want to be a cleaner." "A cleaner?" his mother asked. "That's not a very good job. Why do you want to become a cleaner?" "Because then I would only have to work one day a week," Tom said happily. "Only one day a week?" his mother was very surprised. "Why do you say that? And how do you know?" "Well," Tom said, "I know that the cleaner comes to our house to work only on Thursday because I see her only on that day."

Len was thirty years old, and he had very long hair. He lived in a big city. Because of his long hair, he did not find any work. One day he met an old friend, and this man said to him, "People in this city don't like long hair. Why don't you go to a barber? He can cut a lot of it off, and then you can get some work" At the barber's Len said to the barber, "Please cut most of my hair off."

The barber began. He cut and cut for a long time and then he said to Len, "Were you in the army a few years ago?"

"Yes, I was," Len answered, "Why did you ask that?"

"Because I found a cap in your hair."