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POCode Golf: Phone Number to Words
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copied!<p><a href="https://meta.stackexchange.com/questions/24242">Guidelines for code-golf on SO</a></p> <p>We've all seen phone numbers that are put into words: 1-800-BUY-MORE, etc. </p> <p>What is the shortest amount of code you can write that will produce all the possible combinations of words for a 7 digit US phone number. </p> <p>Input will be a seven-digit integer (or string, if that is simpler), and assume that the input is properly formed. </p> <p>Output will be a list of seven-character strings that </p> <p>For instance, the number 428-5246 would produce</p> <p>GATJAGM<br> GATJAGN<br> GATJAGO<br> GATJAHM<br> GATJAHN<br> GATJAGO<br> GATJAIM<br> GATJAIN<br> GATJAIO and so on..... </p> <p>Winning criterion will be code from any language with the fewest characters that produces every possible letter combination. </p> <p>Additional Notes:</p> <ul> <li>To make it more interesting, words can be formed only by using the letters on a <strong>North American Classic Key Pad</strong> phone with three letters per number <a href="http://www.dialabc.com/motion/keypads.html" rel="nofollow noreferrer">as defined here</a>.<strong><em>That means that Z and Q are excluded.</em></strong> </li> <li>For the number '1', put a space.</li> <li>For the number '0', put a hyphen '-'</li> </ul> <p>Bonus points awarded for recognizing output as real English words. Okay, not really. ;-)</p> <p><strong>Added:</strong> Okay, lets go with "Nick's Modified North American Classic Key Pad" which has an 'O' (oh, not zero) on the 6 key.</p>

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