using System;

using System.Collections.Generic;

using System.Globalization;

using System.IO;

using System.Net;

using System.Threading.Tasks;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var s = Console.ReadLine();

        switch (s) {

            case "a":

                var a = 1;

                Console.WriteLine(a);

                break;

            case "b":

                //var a = 2;

                Console.WriteLine(a);

                break;

            case "c":

                break;

            default:

                break;

        }

    }

}