using System;

using System.Text;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<char> guesses = new List<char>();

        guesses.Add('e');

        guesses.Add('r');

        string answer = "Terminator";

        StringBuilder outputBuilder = new StringBuilder();

        for (var i = 0; i < answer.Length; i++) {

            char current = answer[i];

            if (guesses.Contains(Char.ToLower(current))) {

                outputBuilder.Append(current);

            } else {

                outputBuilder.Append('_');

            }

        }

        string output = outputBuilder.ToString();

        Console.WriteLine($"State: {output}");

    }

}