func_code_string: #include <bits/stdc++.h>   using namespace std;   void read() {}   int main() {     read();     string s;     while (cin >> s) {       int l = s.size();       string ans;       bool f = 0;       for (int i = 0; i < l; i++) {         if (i != 0) {           if (s[i] ==  a  && i + 1 < l - 1 && s[i + 1] ==  t  && !f) {             ans.push_back( @ );             i += 1;             f = 1;             continue;           } else if (s[i] ==  d  && i + 2 < l - 1 && s[i + 1] ==  o  &&                      s[i + 2] ==  t ) {             ans.push_back( . );             i += 2;             continue;           }         }         ans.push_back(s[i]);       }       cout << ans <<   n ;     }   }   