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You see, OP, you wouldn't have failed if your request wasn't so specific.
Palindrome ID chance: .00016%
Dubs: 10%
Palindrome ID + dubs : .000016%
That's one in every 6,250,000 posts, without including samefagging.
It's probably going to happen, but it will most likely not be you
>tl;dr You didn't, and you most likely never will