Steem Riddle of the Week #11: Two Decks

Last weeks riddle was solved by @uber-dragon, congrats to him for claiming the SBD prize! The solution is posted here: https://steemit.com/riddle/@droopy/steem-riddle-of-the-week-10-weighted-balls-solution-revealed-prize-awared

This week, once again, I'm asking that everyone who posts a solution, obfuscate it with ROT13 using this link: http://md5decrypt.net/en/Rot13/ That way others can more easily take part without worrying about spoilers. Only obfuscated posts can win the prize!

This weeks riddle

Two decks of cards are separately and independently shuffled and placed next to each other. The dealer then simultaneously turns over the top card of each deck, then the next card of each deck, and so on, until all the cards have been flipped.

What is the probability that at some point he flips over two of the same card simultaneously, (e.g. he flips the 4 of clubs from both decks on the same flip).

Prize

Again, I'm asking that everyone who posts a solution, obfuscate it with ROT13 using this link: http://md5decrypt.net/en/Rot13/. If your comment isn't obfuscated, you aren't eligible for the prize.

The first person to upvote and comment with a valid obfuscated!!!! solution (as decided by me and only me) prior to this post paying out will win 1SBD! The prize will be paid out right after the rewards from the post are paid.

Don't forget to follow and to check out my past riddles
First off, thanks to everyone for all the support! If you'd like to browse my older riddles you can do so at the links below: