1025: 最大字符
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner cin=new Scanner(System.in);String s;int a,b,c;s=cin.next();a=s.charAt(0);s=cin.next();b=s.charAt(0);s=cin.next();c=s.charAt(0);if(a>b&&a>c) System.out.printf("%c",a);if(b>a&&b>c) System.out.printf("%c",b);if(c>a&&c>b) System.out.printf("%c",c);}
}