#include <bits/stdc++.h>
using namespace std;
int main() {
  string second;
  cin >> second;
  bool check = 0;
  string tmp(1, second[0]);
  for (int i = 1; i < second.size(); i++) {
    if (second[i] == 'd' && second[i + 1] == 'o' && second[i + 2] == 't' &&
        i < second.size() - 3)
      tmp += '.', i += 2;
    else if (second[i] == 'a' && second[i + 1] == 't' && !check &&
             i < second.size() - 2)
      tmp += '@', check = 1, i++;
    else
      tmp += second[i];
  }
  cout << tmp << endl;
}
