We have a security log that tracks, on a daily basis, each time a user enters
our office suite using their security badge. What we are looking for is a
way to remove all the rows from this spreadsheet except for the rows which
contain the first and last time per day the user accessed a badge reader.

Here is some example data:

Admitted 10/17/2007 12:23
Entered 10/17/2007 12:23
Admitted 10/17/2007 14:37
Entered 10/17/2007 14:37
Admitted 10/17/2007 16:55
Entered 10/17/2007 16:55
Admitted 10/17/2007 18:31
Admitted 10/18/2007 10:13
Entered 10/18/2007 10:13
Admitted 10/18/2007 14:11
Entered 10/18/2007 14:11
Admitted 10/18/2007 17:39
Entered 10/18/2007 17:39
Admitted 10/18/2007 17:43
Entered 10/18/2007 17:43
Admitted 10/19/2007 10:46
Entered 10/19/2007 10:46
Admitted 10/19/2007 16:39
Entered 10/19/2007 16:39
Admitted 10/19/2007 18:40
Entered 10/19/2007 18:40
Admitted 10/19/2007 21:13
Admitted 10/22/2007 10:33
Entered 10/22/2007 10:33
Admitted 10/22/2007 13:17
Entered 10/22/2007 13:17
Admitted 10/22/2007 14:03
Entered 10/22/2007 14:03
Admitted 10/22/2007 15:58
Entered 10/22/2007 15:58
Admitted 10/22/2007 18:51

What we wouuld like to get in the end would be:

Admitted 10/17/2007 12:23
Admitted 10/17/2007 18:31
Entered 10/18/2007 10:13
Entered 10/18/2007 17:43
Admitted 10/19/2007 10:46
Admitted 10/19/2007 21:13
Entered 10/22/2007 10:33
Admitted 10/22/2007 18:51

Thanks very much!