func_code_string: #include <bits/stdc++.h>   using namespace std;   void gethas(string s, int &has0, int &hasa, int &hasA) {     int n = int(s.size());     has0 = 0;     hasa = 0;     hasA = 0;     for (int i = 0; i < n; i++) {       char c = s[i];       has0 = has0 or ( 0  <= c and c <=  9 );       hasa = hasa or ( a  <= c and c <=  z );       hasA = hasA or ( A  <= c and c <=  Z );     }   }   bool valid(string s) {     int has0, hasa, hasA;     gethas(s, has0, hasa, hasA);     return has0 and hasa and hasA;   }   bool check(string s) {     if (valid(s)) {       cout << s << endl;       return true;     }     return false;   }   int cases;   int main() {     cin >> cases;     for (int cas = 0; cas < cases; cas++) {       string s;       cin >> s;       if (check(s)) continue;       int n = int(s.size());       int has0, hasa, hasA;       gethas(s, has0, hasa, hasA);       if (has0 + hasa + hasA == 2) {         for (int i = 0; i < n; i++) {           if (check(s.substr(0, i) +  0  + s.substr(i + 1, n - i))) break;           if (check(s.substr(0, i) +  a  + s.substr(i + 1, n - i))) break;           if (check(s.substr(0, i) +  A  + s.substr(i + 1, n - i))) break;         }         continue;       }       for (int i = 0; i < n - 1; i++) {         if (check(s.substr(0, i) +  0a  + s.substr(i + 2, n - i - 1))) break;         if (check(s.substr(0, i) +  0A  + s.substr(i + 2, n - i - 1))) break;         if (check(s.substr(0, i) +  aA  + s.substr(i + 2, n - i - 1))) break;       }     }   }   