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File.1 conversion table in a tab delimited format

...
CGP_A0000000020 AAAT
CGP_A0000000021 AAAU
CGP_A0000000022 AAAV

File.2 has three column and the 2nd needs to be replaced, using conver
+sion table of (File1)

...
6490426 CGP_A0000000003 1389
6206360 CGP_A0000000003 1391

the RESULT file is the same as the second file but the the second colu
+mn has the equivalent IDs from 2nd column of file 1
3998122 AAAA 13
...
3998162 AAAA 21
638421  AAAA 23
2395226 AAAA 25

#!/usr/bin/perl -w

...
}
close(INPUT2);
close(RESULTS);