using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        string stringToCut = null;

        var result = !string.IsNullOrEmpty(stringToCut) ? stringToCut[..Math.Min(stringToCut.Length, 2)] : string.Empty;

        Console.Write(result);

    }

}