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I guess, but again, what's your actual question? You've posted your homework, or at least part of it, but you haven't told us where you're stuck or what you've tried. Break your problem down into...

That's a pretty open question, and it's going to depend entirely on your context, which we don't know. Which part of this are you having trouble with? Getting input from a user? Matching types of...

We can try to help you, but you have to ask us a question first.