authorship - Authorship Verification Slippery Redux the...

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Sheet1 Page 1 Authorship Verification ---------- ------------ Slippery Redux, the Text Private Eye, is trying to set up a system to catch text copycats. To do this he needs a program that will take input text and count the words that match a pattern. The patterns he is interested in are fairly simple: they merely match the beginning of each word to see if there is some sequence of vowels and consonants and particular letters. Thus the pattern `CVC' matches all words beginning with a consonant followed by a vowel followed by a consonant, and the pattern `thV' matches all words beginning with the letters `th' followed by a vowel. The input has been preprocessed so it is just a sequence of data words each of which contain nothing but lower case letters. The pattern is a word consisting of lower case letters and the letters `C' and `V'. In a pattern, a lower case letter matches only the letter itself in a data word, while `C' in a pattern matches any consonant in a data word, and `V' in a pattern matches any vowel in a data word.
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