#!/usr/bin/perl -w use strict; my %fets; print "\n\n"; open IHF, " ) { my ($k, $v) = split; $fets{$k} = $v if defined ($k) and defined ($v); } close IHF ; open JHF, ") { my ($key, $val) = split; print $key." ".$fets{$key}." ".$val."\n" if exists $fets{$key} ; } close JHF ;