If you're single, Valentine's Day can be a rough holiday.

But if you waited until the last minute to find a date, fear not.

Hinge, a popular dating app that introduces users to friends of friends, says it's figured out which opening lines on a dating app land you a date the fastest — and which don't.

Hinge's data scientists studied 5,000 Hinge users who exchanged phone numbers within 24 hours. Then, they identified the most common words or phrases that led to success or failure.

Don't apologize.

Don't be vague.

Be funny.

If their name is unique or cool, compliment them on it.

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