#include <bits/stdc++.h>
#include <atcoder/all>

using namespace std;
using namespace atcoder;

using ll = long long;
typedef pair<ll,ll> P;
#define SORT(a) sort((a).begin(),(a).end())
#define REV(a) reverse((a).begin(),(a).end())
#define For(i, a, b)    for(ll i = (a) ; i < (b) ; ++i)
#define rep(i, n)       For(i, 0, n)
#define debug(x)  cerr << #x << " = " << (x) << endl;
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }

void coY() {cout <<"Yes"<<endl;}
void coN(){cout <<"No"<<endl;}
void coT() {cout <<"Takahashi"<<endl;}
void coA(){cout <<"Aoki"<<endl;}

void mswap(ll &a, ll &b){ if(a >= b) swap(a,b); }
void rswap(ll &a, ll &b){ if(a <= b) swap(a,b); }

const ll dy[] = {0,0,1,-1};
const ll dx[] = {1,-1,0,0};
const ll mod = 1e9+7;
const ll MOD = 998244353;
using mint = modint998244353;
const double PI=3.14159265358979323846;
const ll inf = 1001001001;
const ll INF = 9'000'000'000'000'000'000;

vector<ll> to[200'005];
//Write From this Line
int main()
{
	string T;
	cin >> T;
	bool flag = false;
	rep(i,T.size()){
		if(T[i] == '('){
			flag = true;
			cout << '@';
			continue;
		}
		if(T[i] == ')'){
			flag = false;
			continue;
		}
		if(flag)continue;
		cout << T[i];
	}
	cout << endl;
}