East of the Sun and West of the Moon

Once upon a time there was a poor man who had many children and no measures to give them in the way either of food or clothing. His youngest daughter was very pretty and beautiful. One evening a poor man heard someone knocking at his window. The man went out to see what could be the matter, and when he got out there stood a great big white bear. The bear said to him: "If you want to be rich, give me your youngest daughter!" What was the man to do? Listen to the story to the end to find out!