My end is near!!!

Background:

You are an office worker. And the end of the working day is already approaching, but you remember that you need to make papers! And there are only 2 minutes left! Your end is near!!!

Clue:

You need to put stamps on the papers and take them to some booth, where they will give you new papers. Go back to C3 and put stamps on new papers. Then take them to another booth. And so on until the paper runs out!

Control:

interaction "E"

walking "WASD"

Thank you for attention!