func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int s;     cin >> s;     while (s--) {       string t;       cin >> t;       int f = 0;       for (int i = 1; i < t.length(); i++) {         if (t[i] != t[i - 1]) {           f = 1;           break;         }       }       if ((f == 0) || (t.length() == 2)) {         cout << t << endl;       } else {         cout << t[0];         for (int i = 1; i < t.length(); i++) {           if (t[i] == t[i - 1]) {             if (t[i] ==  0 ) {               cout << 1 << t[i];             } else if (t[i] ==  1 ) {               cout << 0 << t[i];             }           } else {             cout << t[i];           }         }         cout << endl;       }     }     return 0;   }   