using static System.Math;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System;

public class Hello
{
    static void Main()
    {
        var s = Console.ReadLine().Trim();
        getAns(s);
    }
    static void getAns(string s)
    {
        var p0 = s.IndexOf('(');
        var p1 = s.IndexOf(')');
        Console.WriteLine(s.Substring(0, p0) + "@" + s.Substring(p1 + 1));
    }
}