1 // Preliminary Part about Code Similarity

     1 // Preliminary Part about Code Similarity

     2 //========================================

     2 //========================================

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     7 //(1) Complete the clean function below. It should find

     7 //(1) Complete the clean function below. It should find

     8 //    all words in a string using the regular expression

     8 //    all words in a string using the regular expression

     9 //    \w+  and the library function 

     9 //    \w+  and the library function 

    10 //

    10 //