using System;

public class Program

{

    public static void Main()

    {

    int input1=Convert.ToInt32(Console.ReadLine());

    int input2=Convert.ToInt32(Console.ReadLine());

    int input3=Convert.ToInt32(Console.ReadLine());

    string str1=input1.ToString();

    string str2=input2.ToString();

    string str3=input3.ToString();

    char[] ch1=str1.ToCharArray();

    Array.Sort(ch1);

    char[] ch2=str2.ToCharArray();

    Array.Sort(ch2);    

    char[] ch3=str3.ToCharArray();

    Array.Sort(ch3);

    String L1=Convert.ToString(ch1[ch1.Length-1]);

    String L2=Convert.ToString(ch2[ch2.Length-1]);

    String L3=Convert.ToString(ch3[ch3.Length-1]);

    String l1=Convert.ToString(ch1[ch1.Length-2]);

    String l2=Convert.ToString(ch2[ch2.Length-2]);

    String l3=Convert.ToString(ch3[ch3.Length-2]);

    int key=Convert.ToInt32(L1)+Convert.ToInt32(L2)+Convert.ToInt32(L3)+Convert.ToInt32(l1)+Convert.ToInt32(l2)+Convert.ToInt32(l3);

    Console.WriteLine(key);

    }

}