import java.io.*;
import java.util.*;

class Main
{
    public static void main(String args[])throws Exception
    {
        BufferedReader bu=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb=new StringBuilder();
        String s=bu.readLine();
        for(int i=0;i<s.length();i++)
        {
            if(s.charAt(i)!='(') {sb.append(s.charAt(i)); continue;}
            sb.append("@");
            while(i<s.length() && s.charAt(i)!=')') i++;
        }
        System.out.println(sb);
    }
}