#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  string t, u;
  bool f = false, ok = false;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == '(') f = true;
    if (!f && !ok) t += s[i];
    if (f && ok) u += s[i];
    if (s[i] == ')') ok = true;
  }
  cout << t << "@" << u << endl;
  return 0;
}