using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(int n) => Enumerable.Repeat(0, n).Select(_ => NList).ToArray();
    static void Main()
    {
        var t = ReadLine();
        var left = t.IndexOf('(');
        var right = t.IndexOf(')');
        WriteLine(string.Concat(t.Take(left).Concat("@").Concat(t.Skip(right + 1))));
    }
}