题目内容：

短文改错

On a Friday night, a poor young artist was playing with his violin at a street corner with a large piece of paper on the ground. Before long, he was surrounding with people, who were all attracted by the word on that paper. It said, “Last night, a gentleman put an important thing into my hat with mistake. Please come to claim them soon.” Seeing this, people wondered why it could be. Some time later, a man came and take back his lottery which won a prize of $ 500,000. When asked why he didn’t keep it for himself, artist said, “While I don’t have much money, I live happy. However, if I lose honest, I won’t be happy forever.”