Thank you for your help!

Sorry, but your script is excluding only the second repeat, so the actual output looks like this:

567              344  
1345            567
2346               78   
3456             67 
3456            789
4678            45    
5349            6
6700            50
8964            560

[download]
Thank you once more.

In reply to Re^2: Repeats exclusion by Grig
in thread Repeats exclusion by Grig

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