Hi, So my thinking was basically this: get the first file to <Double> list round and move to <Integer> list move to <String> list with added " " change <String> list to String write to file 2. I am way top tired to think about more pretty solution (and also eliminate some unecessary steps there), so my question is - is my solution good and the validator just does not want to accept it, or do I have mistake in my solution? Thanks!