using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
namespace Paiza
{
    static class Problem
    {
        static void Main (string[] args)
        {
            string T = Console.ReadLine();
            int indexKakko = T.IndexOf('(');
            int indexKokka = T.IndexOf(')');
            string U = T.Substring(indexKakko, indexKokka - indexKakko + 1);
            Console.WriteLine(T.Replace(U, "@"));
        }
    }

}