Comparing two strings in excel, add value for common variables
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        Published on 2014-08-21T21:24:11Z
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            2014/08/21
            22:22 UTC
        
        
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I'm comparing two large datasets containing strings in excel. Column A contains the numbers 1-1,000,000. Column B contains 1,000,000 strings, neatly organized in the desired order. Column C contains 100,000 randomly organized strings, that have identical values somewhere in column B.
Example:
A        B         C          D
1     String1   String642
2     String2   String11
3     String3   String8000
4     String4   String78
What I'd like to do is find duplicate values in columns B and C then output the Column A value that corresponds with the string in Column C into Column D.
Desired Output:
A        B         C          D
1     String1   String642    642
2     String2   String11     11
3     String3   String8000   8000
4     String4   String78     78
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