/* -*- coding: utf-8 -*-
 *
 * 2041.cc:  No.2041 E-mail Address - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

const int MAX_N = 100000;

/* typedef */

/* global variables */

char t[MAX_N + 4];

/* subroutines */

/* main */

int main() {
  scanf("%s", t);

  char *cpt = t;
  while (*cpt != '(') putchar(*(cpt++));
  while (*cpt != ')') cpt++;
  putchar('@'); cpt++;
  while (*cpt) putchar(*(cpt++));
  putchar('\n');

  return 0;
}