using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("What grade did you get?");

        string grade = Console.ReadLine();

​

        if (grade == "A"){

        Console.WriteLine("Good job.");

        }

        if (grade == "B"){

        Console.WriteLine("Good job.");

        }

        if (grade == "C"){

        Console.WriteLine("Room for Improvement.");

        }

        if (grade != "C" + "B" + "A" ){

        Console.WriteLine("Try harder.");

        }

    }

}