using System;

class RacunajZbir {
  static void Main() {
    Console.Write("Izraz -> ");
    string s = Console.ReadLine();
    int L = s.Length;
    int n = s.IndexOf('+');
    if(L == 0) {
      Console.WriteLine("Greska: prazan string");
    }
    else if(n == 0) {
      Console.WriteLine("Greska: nema zanaka +");
    }
    else {
      double a = double.Parse(s.Substring(0, n));
      double b = double.Parse(s.Substring(n + 1, L - 1 - n));
      Console.WriteLine("{0}+{1}={2}", a, b, a + b);
    }
  }
}