perrin,
Isn't it pretty much the same problem that all of the JavaScript autocomplete backend scripts solve?
Not exactly, auto-completion is a technique to predict what you are going to type in the future based off what you have already typed. I did a bit of research this morning before posting and there are a number of papers out there regarding predictive texting - so yes, it is a solved problem. That shouldn't deter you from the fun of the challenge.
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