using System;
    using System.Collections.Generic;
    using System.Linq;

    public class Program
    {
        public static void Main()
        {
            string lineOne = Console.ReadLine();

            while (lineOne != "collapse")
            {
                string lineTwo = Console.ReadLine();

                while (lineTwo.Length > 0)
                {
                    bool contains = lineOne.Contains(lineTwo);

                    if (contains)
                    {
                        lineOne = lineOne.Replace(lineTwo, string.Empty);
                        contains = false;
                    }
                    else
                    {
                        lineTwo = lineTwo.Remove(0, 1);
                        if (lineTwo.Length > 0)
                        {
                            lineTwo = lineTwo.Remove((lineTwo.Length - 1), 1);
                        }
                    }
                }

                if (lineOne.Length > 0)
                {
                    Console.WriteLine(lineOne.Trim());
                }
                else
                {
                    Console.WriteLine("(void)");
                }

                lineOne = Console.ReadLine();
            }
        }
    }