#include <bits/extc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)

using std::cin;
using std::cout;
using std::min;
using std::map;
using std::vector;
using std::string;
using ll = long long;

struct Edge {
    int a, b; ll c;
    Edge(int a, int b, ll c=0): a(a), b(b), c(c) {}
};

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