LOL. I mean, if it existed Reversr is potentially a really interesting business, like they presumably have some very sophisticated language analysis stuff and they've got a bunch of different reverses they can do, for example maybe there are cases where (020) 6543 2109 should be reversed as 9012 3456 (020) notice the parentheses swapped there to still make sense. Or they can reverse "black cat named Noir" to "white cat named Blanc" or a whole bunch of interesting work.

But, I'm guessing Reversr don't want me to write some awful slice swapping algorithm that disrespects their hard won knowledge about human writing systems.