#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (ll i = 0; i < (n); ++i)
#define rrep(i, n) for (ll i = n; i > 0; --i)
#define bitrep(i, n) for (ll i = 0; i < (1 << n); ++i)
#define all(a) (a).begin(), (a).end()
#define rall(a) (a).rbegin(), (a).rend()
#define yesNo(b) ((b) ? "Yes" : "No")
using ll = long long;
using ull = unsigned long long;
using ld = long double;
string alphabet = "abcdefghijklmnopqrstuvwxyz";
string ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const double pi = 3.141592653589793;
int smallMOD = 998244353;
int bigMOD = 1000000007;

void split(vector<string> &elems, const string &s, char delim)
{
    stringstream ss(s);
    string item;
    while (getline(ss, item, delim))
    {
        if (!item.empty())
            elems.push_back(item);
    }
}

int main()
{
    string s;
    cin >> s;
    int scene = 0;
    rep(i, s.size())
    {
        if (scene == 0)
        {
            if (s[i] == '(')
            {
                scene++;
            }
            else
            {
                cout << s[i];
            }
        }
        else if (scene == 1)
        {
            if (s[i] == ')')
            {
                cout << "@";
                scene++;
            }
        }
        else if (scene == 2)
        {
            cout << s[i];
        }
    }
    cout << endl;
    return 0;
}