diff --git a/list_same/list_same b/list_same/list_same
index 8fa9c22..8931356 100755
--- a/list_same/list_same
+++ b/list_same/list_same
@@ -93,8 +93,13 @@ sub output($) {
 		$string =~ s/ /\\ /g;
 		$string =~ s/'/\\'/g;
 		$string =~ s/"/\\"/g;
+		$string =~ s/\(/\\\(/g;
+		$string =~ s/\)/\\\)/g;
+		$string =~ s/\[/\\\[/g;
+		$string =~ s/\]/\\\]/g;
 		print "$string";
 	} else {
 		print "$string";
 	}
+	$opt_e = $opt_e;
 }