Yesterday afternoon, Teacher Zhang assigned a math thinking question (writing poems).

Yesterday afternoon, Teacher Zhang assigned a math thinking question. At night, I racked my brains and couldn't figure it out. Just as I was scratching my head, my father came over and gave me a helping hand. With a little help from him, I was suddenly enlightened. It's really (the mountains are heavy and the waters are heavy, and there is no road to doubt, and there is another village). So I solved the problem quickly.