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, "@")); } } }