Why bother writing a program if there's already one doing this? 
$ uniq -c
Jim
Jim
Jim
Peter
Anreas
Nick
Nick
Nick
Wolfgang
Matthew
John
John
John
NikolaiJim
Peter
Anreas
Nick
Wolfgang
Matthew
John
Nikolai
^D
      3 Jim
      1 Peter
      1 Anreas
      3 Nick
      1 Wolfgang
      1 Matthew
      3 John
      1 NikolaiJim
      1 Peter
      1 Anreas
      1 Nick
      1 Wolfgang
      1 Matthew
      1 John
      1 Nikolai
$

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In reply to Re: How to group identical words? by JavaFan
in thread How to group identical words? by Anonymous Monk

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