In Tom's class, every student has a pen pal. Miss White helps them to send letters once a week. Tom knows his pen pal goes to school on foot, and his pen pal's mother is a doctor. His pen pal's father is a teacher. They live next to a hospital. He also knows his pen pal's favourite food is noodles, and his favourite colour is red. Tom knows a lot about his pen pal, but he doesn't know his pen pal's name.