using System;
using System.Collections.Generic;
namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
#if LocalDebug
            var exStdIn = new System.IO.StreamReader("stdin.txt");
            System.Console.SetIn(exStdIn);
#endif
            var Data = GetList();
            var Sum = 0;
            foreach(var n in Data)
            {
                Sum += int.Parse(n);
            }

            Console.WriteLine(55 - Sum);
           

#if LocalDebug
            System.Console.ReadKey();
#endif
        }


        static int GetData()
        {
            return int.Parse(Console.ReadLine());
        }

        static string[] GetList()
        {
            return Console.ReadLine().Split(' ');
        }



    }
}