using System;

public class Program

{

    public static void Main()

    {

        var type = Console.ReadLine();

        if (type=="int")

        {

            int first = int.Parse(Console.ReadLine());

            int second = int.Parse(Console.ReadLine());

            int max = GetMax(first, second);

            Console.WriteLine(max);

        }

        else if (type=="char")

        {

            char first = char.Parse(Console.ReadLine());

            char second = char.Parse(Console.ReadLine());

            char max = GetMax3(first, second);

            Console.WriteLine(max);

        }

        else if (type=="string")

            {

            string first = Console.ReadLine();

            string second = Console.ReadLine();

            string max = GetMax2(first, second);

            Console.WriteLine(max);

        }

    }

    static int GetMax(int first, int second)

    {

        if (first>=second)

        {

            return first;

        }

        else

        {

            return second;

        }

    }

    static string GetMax2(string first, string second)

    {

        if (first.CompareTo(second) >= 0)

        {

            return first;

        }

        else

        {

            return second;

        }

    }

    static char GetMax3(char first, char second)

    {

        if (first>=second)

        {

            return first;

        }

        else

        {

            return second;

        }   }

}