New data files for the last part of oblig 1

There has been a technical glitch on our side for the train and test files for the last part of the obligatory assignment 1, which led to the train and test files containing many of the same input examples.

This is now corrected, and here are some new files in which the train and test files are fully separated: train file and test file.

If you have already submitted the assignment, no worries, this does not in any way affect the actual solution for the tasks, so you don't need to resubmit.