Help needed with regular expressions

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ThreadAuthorDate (-000)
M++++\John Wheat2006-01-25 23:17
||||M|Mike Garfias2006-01-26 00:40
|||||MJeff Garland2006-01-26 00:55
|||||Mvodhner@cox.net2006-01-26 01:04
||||MDarrin Chandler2006-01-26 01:16
|||Mder.hans2006-01-26 01:55
|||MMike Garfias2006-01-26 02:49
|M|Jerry Davis2006-01-26 03:37
||MJosh Coffman2006-01-26 04:31
|MDarrin Chandler2006-01-26 14:48
MMike Garfias2006-01-26 22:50