why isn't this working (perl Question)

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M-\Sean Roe
M\|Kimbro Staken
|M|Nick Estes
|.MNick Estes
M\David A. Sinck
|MKimbro Staken
|MDavid A. Sinck
MEden Li
MDavid A. Sinck
MEden Li
MDavid A. Sinck