Joe and Fred were helping to build a house in a village. The weather was very warm, there was a lot of dust everywhere, and by half past twelve, they were very thirsty, so they stopped work to have their lunch. They found the nearest small bar, went in and sat down with their sandwiches.

"Good afternoon, gentlemen. What can I get you?" the man behind the bar asked.

Joe looked at Fred and said, "Beer, I think. Yes, a pint of beer each. Is that all right for you, Fred?"

"Yes, that's all right." Fred said. Then he turned to the man behind the bar and said, "And I want it in a clean glass! Don't forget that."

The man behind the bar filled the glasses and brought them to Joe and Fred. Then he said. "Which of you asked for the clean glass?"

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