open (LOG, "GWSvc.log") || die "Unable to get a handle to the file: $!\n";

while (<LOG>) {
	if (/c9391b56-b174-441b-921c-7d63/) {
		$. = ($. - 5);
		for (my $i=0;$i<=10;$i++) {
			print;
			$.++;
		}
	}
}