using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("HELLO WORLD\n");

        Console.WriteLine("Input :");

        int ninput = Convert.ToInt16(Console.ReadLine());

        List<string> List_n = new List<string>();

        List<string> List_Input = new List<string>();

        for (int x = 0; x < ninput; x++)

        {

            string input = Console.ReadLine().Replace(" ", "");

            string n = input;

            List_Input.Add(input);

        }

​

        foreach (string item in List_Input)

        {

            string input = item.Replace(" ", "");

            string n = input;

            for (int a = 0; a < input.Length; a++)

            {

                for (int b = 0; b < n.Length; b++)

                {

                    if (input[a] == n[b])

                    {

                        Console.Write(n[b]);

                        n = n.Remove(b, 1);

                    }

                }

            }

            Console.WriteLine();

        }

    }

}