#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using ld=long double;
using P=pair<ll,ll>;
using V=vector<int>;
#define rep(i,n) for(int i=0;i<n;i++)
#define REP(i,n) for(int i=1;i<=n;i++)

int main(){
    string s;
    cin >> s;
    int n=s.size();
    rep(i,n-1) if((s[i]=='('||s[i]=='-')&&s[i+1]!=')') s[i+1]='-';
    rep(i,n){
        if(s[i]=='-'||s[i]==')') continue;
        if(s[i]=='(') cout << "@";
        else cout << s[i];
    }
    cout << endl;
}