use strict; open my $in, '<', 'CLF17936.out'; open my $out, '>', "logfile.txt"; my $check = 0; my @lines; LINE: while(<$in>) { @lines = split('', $_); $check += 1 if $lines[0] eq 'h'; if($check%2 == 1) { SWITCH: { if($lines[0] eq 'j') { my $first = substr $_, 37, 20; my $second = substr $_, 67, 3; print $out "\n Name: $first\t ABICODE: $second\n"; } if($lines[0] eq 'k') { my $qstatus = substr $_, 113, 1; if($qstatus ne "1") { print $out "FAIL\n"; next LINE; } } if(($lines[0] eq 'E') || ($lines[0] eq 'G')) { print $out "$_"; } } } } close($in);