What is the unbalanced equation for the combination of sulfur dioxide, sulfur trioxide, and water?

I'm struggling a lot with this question in chemistry. The full text of the question is, "the burning high-sulfur fuel can lead to acid rain. When these fuels are burned, they produce sulfur dioxide and sulfur trioxide. The combination of these compounds in the presence of water leads to the production of sulfurous acid and sulfuric acid. Write the unbalanced equation for the combination of sulfur dioxide, sulfur trioxide, and water." if you can answer this, I'd really appreciate any explanation you have for how you got the answer as well!