using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        while (true) {

        string input = Console.ReadLine();

        string pattern = @"(?<=\().*?(?=\))";

        Regex rg = new Regex(pattern);

        MatchCollection matchedInput = rg.Matches(input);

        Console.WriteLine(matchedInput[0]);

        }

    }

}