You have to use two words that are each their own opposite (auto-antonyms, contronyms, contranyms or whatever you want to call it) in the same sentence. This means that each of the two words in used twice, and for each word, the two occurrences have meanings that are opposite (contradictory) (**or extremely different ** meaning they are so different one could argue they're opposites.) to each other. This sentence must be a grammatically correct English sentence.
It's ok to use minor variations on words such as plurals or conjugated verb forms.
The goal is to make it short (in terms of characters). The accepted answer will always be the shortest. To save me trouble, it'd be nice for you to post the number of characters in your sentence. Spaces and punctuation count; you can use this site to check.
Anti-loophole: the words you choose must each be used twice, once as one meaning and again as another.