import java.util.Scanner;

/**
 * Created by Ivan on 6/20/2017.
 */
public class GreaterOfTwoValues {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
     String type = scanner.nextLine();
     switch (type){
         case "int": {
             int value1 = Integer.parseInt(scanner.nextLine());
             int value2 = Integer.parseInt(scanner.nextLine());

             int greater = Max(value1, value2);
             System.out.println(greater);
             break;
         }
         case "char":{
             char char1 ;
             char char2 ;
             char1 = scanner.nextLine().charAt(0);
             char2 = scanner.nextLine().charAt(0);
             char greater = Max(char1, char2);
             System.out.println(greater);
         }

         case "string":{
             String value1 = scanner.nextLine();
             String value2 = scanner.nextLine();
             String greater = Max(value1, value2);
             System.out.println(greater);
             break;
         }
     }
    }


    private static int Max(int int1, int int2) {
        if (int1 > int2){
            return int1;
        }
            return int2;
    }
    private static char Max(char char1, char char2) {
        Scanner scanner = new Scanner(System.in);
        if (char1 > char2){
            return char1;
        }
        return char2;
    }
    private static String Max(String str1, String str2) {
        Scanner scanner = new Scanner(System.in);
         int first = str1.compareTo(str2);
if (first >= 0){
    return str1;
    }
    return str2;
    }
}