Answer :
Well you can add 50 words like the requirements say. What is your essay about? You just need to think about the 50 words you want to finish your essay with. Then you can turn it in.
You can write about your thoughts, what you think about the theme... And if you still have a few words left you could write some random words and just make them white afterwards... It only works if you print the essay.. BUT I DO NOT RECOMMEND IT.. But it's an option..