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The puzzle king chooses his son-in-law

Once upon a time, there was a king who wanted to choose a clever and witty husband for his precious daughter. So there is such a strange question, recruiting a son-in-law.

"All the handsome guys who come to the exam can't give me gifts or come empty-handed."

As a result, a young man with both talents and looks did it and was recruited as the son-in-law of the king.

Do you know how he did it?