using System;
using System.Collections.Generic;
using System.IO;

namespace test_compare
{
    class Program
    {
        static void Main(string[] args)
        {
            var muster = File.ReadAllText("/Users/hajasdom/Downloads/LUKS/Kundendaten_Muster");
            var schablone = File.ReadAllText("/Users/hajasdom/Downloads/LUKS/Kundendaten_Schablone");
            var merged = new List<char>();
            var array_muster = muster.ToCharArray();
            var array_schablone = schablone.ToCharArray();
            //vergleich
            int counter = 0;
            while(counter<array_muster.Length)
            {
                if(array_muster[counter]==array_schablone[counter])
                    merged.Add(array_muster[counter]);

                counter++;
            }
            Console.WriteLine(string.Join("", merged.ToArray()));
        }
    }
}