#include <bits/stdc++.h>
using namespace std;
vector<int> a, d;
int cnt = 0;
void preKMP(string pattern, int f[]) {
  int m = pattern.length(), k = 0;
  f[0] = 0;
  int i = 1;
  while (i < m) {
    if (pattern[i] == pattern[k]) {
      f[i] = k + 1;
      k++;
      i++;
    } else {
      if (k != 0)
        k = f[k - 1];
      else {
        f[i] = 0;
        i++;
      }
    }
  }
}
void KMP(string pattern, string target) {
  int m = pattern.length();
  int n = target.length();
  int f[m];
  preKMP(pattern, f);
  int i = 0;
  int k = 0;
  while (i < n) {
    if (target[i] == pattern[k]) {
      i++;
      k++;
    }
    if (k == m) {
      if (cnt == 0) d.push_back(i - k);
      if (cnt == 1) a.push_back(i - k);
      k = f[k - 1];
    } else if (i < n && pattern[k] != target[i]) {
      if (k != 0)
        k = f[k - 1];
      else
        i++;
    }
  }
}
int main() {
  string str;
  cin >> str;
  const int N = str.size();
  KMP("dot", str);
  cnt++;
  KMP("at", str);
  for (int i = 0; i < d.size(); ++i) {
    if (d[i] != 0 && d[i] != N - 3) str[d[i]] = '`';
  }
  for (int i = 0; i < a.size(); ++i) {
    if (a[i] != 0 && a[i] != N - 2) {
      str[a[i]] = '~';
      break;
    }
  }
  string res = "";
  for (int i = 0; i < N; ++i) {
    if (str[i] == '`' && i != 0 && i != N - 3) {
      res += '.';
      i += 2;
    } else if (str[i] == '~' && i != 0 && i != N - 2) {
      res += '@';
      i += 1;
    } else
      res += str[i];
  }
  cout << res;
  return 0;
}
