#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll = long long;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using pii = pair<int, int>;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define repr(i, n) for (int i = (int)(n - 1); i >= 0; --i)

int main() {
    string s;
    cin >> s;
    rep(k, s.size()) {
        if (s[k] == '(') {
            cout << '@';
            while (s[k] != ')') k++;
        } else {
            cout << s[k];
        }
    }
    cout << endl;
    return 0;
}