Jim, a young farmer, was once put into prison . One day, he got aletter from his mother. "I'm so worried about our farm,"she wrote. "It'stime to plant potatoes. I can't dig  all the fields by myself. Jim read the letter and became sad. "What can I do?" he thought. Then he had a good idea. He wrote to his mother, "Don't dig the fields, there's a pot  of money in the earth. Don't plant potatoes until I come home. " Some days later, Jim got another letter from his mother. It said, "Two days ago, about ten men came to our farm and dug all our fields. I can't understand it. It looks as if they were looking for something. What shall I do?" Jim smiled when he read his mother's letter. He wrote a letter to his mother at once. It was very short. Guess what it would say? Jim's mother told him that about ten men came to dig their fields. These men might be  _  .
farmers Jim's friends prison guards Jim's brothers