#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG_
#include <compe/debug.hpp>
#else
#define dump(...)
#endif

#define FastIO cin.tie(nullptr), ios_base::sync_with_stdio(false);
#define rep(i, n) for (int i = 0; (int)i < n; ++i)
#define output(msg) cout << (msg) << '\n'
#define die(msg)         \
  do {                   \
    cout << msg << endl; \
    exit(0);             \
  } while (0)

template <typename T> bool chmax(T& a, const T& b) {
  return ((a < b) ? (a = b, true) : (false));
}
template <typename T> bool chmin(T& a, const T& b) {
  return ((a > b) ? (a = b, true) : false);
}

using llint = long long int;

string remove_atmark(const string& s) {
  string ans{};
  int left{}, right{};

  rep(i, (int)s.size()) {
    if (s[i] == '(') left = i;
  }
  for (int i = (int)s.size() - 1; i >= 0; --i) {
    if (s[i] == ')') right = i;
  }

  return s.substr(0, left) + "@" + s.substr(right + 1);
}

int main() {
  FastIO;
  string s;
  cin >> s;

  s = remove_atmark(s);
  output(s);
}