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        $_= ~/^\w+\s*=\s*\w+\s*\,\?\w+/ ;
    
  2. or download this
    /^       # anchored to the beginning of the string
     \w+     # one or more word characters (a word)
    ...
     \?      # a question mark
     \w+     # one or more word characters (a word)
        /x;