#include <bits/stdc++.h>
using namespace std;
int main() {
  std::ios::sync_with_stdio(false);
  cin.tie(0);
  string dot = "dot", att = "at", in;
  cin >> in;
  int start = 0, end = in.size();
  string temp = in.substr(0, 3), temp2 = in.substr(in.length() - 3, 3),
         temp3 = in.substr(0, 2), temp4 = in.substr(in.length() - 2, 2);
  string ans = "";
  bool f1 = false, f2 = false, atExists = false;
  if (temp == dot) {
    ans += temp;
    start = 3;
  } else if (att == temp3) {
    ans += temp3;
    start = 2;
  }
  if (dot == temp2) {
    f1 = true;
    end = in.size() - 3;
  } else if (att == temp4) {
    f2 = true;
    end = in.size() - 2;
  }
  for (int i = start; i < (int)(end); i++) {
    bool batee5 = false;
    if (i + 2 < end) {
      if (in[i] == 'd')
        if (in[i + 1] == 'o')
          if (in[i + 2] == 't') {
            ans += ".";
            batee5 = true;
            i += 2;
          }
    }
    if (!atExists && i + 1 < end)
      if (in[i] == 'a')
        if (in[i + 1] == 't') {
          atExists = true;
          ans += "@";
          batee5 = true;
          i++;
        }
    if (!batee5) ans += in[i];
  }
  if (f1) ans += dot;
  if (f2) ans += att;
  cout << ans;
  return 0;
}
