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

int main(){
  string address;
  cin >> address;
  int a, b;
  rep(i, address.length()){
    if(address[i] == '('){
      a = i;
    }else if(address[i] == ')'){
      b = i;
    }
  }
  rep(i, a){
    cout << address[i];
  }
  cout << "@";
  rep(i, address.length() - b - 1){
    cout << address[i + b + 1];
  }
  cout << endl;
  return 0;
}