using System.Numerics;

public class Program
{
    public static void Main()
    {

        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        //string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        string str = Console.ReadLine() ?? string.Empty;

        int index = str.IndexOf('(');
        int last = str.IndexOf(')');

        string a = "";
        for(int i = index; i <= last; i++)
        {
            a += str[i];
        }
        str =str.Replace(a, "@");
        Console.WriteLine(str);
    }
}