Hello jwkrahn, Thank you so much for your useful code! Thank you again and really appreciated!

li@li-HP-$ perl match12.pl
Use of uninitialized value $second in exists at match12.pl line 25, <$
+TAB> line 1.
Use of uninitialized value $second in hash element at match12.pl line 
+26, <$TAB> line 1.

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In reply to Re^2: match two files by yueli711
in thread match two files by yueli711

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