func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long MOD = (long long)1e9 + 7;   string substrs(string s, int i, int j) {     string a;     for (int h = i; h < j + 1; h++) {       a.push_back(s[h]);     }     return a;   }   int main() {     int T;     cin >> T;     for (int zz = 0; zz < T; zz++) {       string s, s1;       cin >> s;       vector<int> cnt[3];       for (int i = 0; i < s.length(); i++) {         if (islower(s[i])) {           s1.push_back( l );           cnt[0].push_back(i);         } else if (isupper(s[i])) {           s1.push_back( u );           cnt[1].push_back(i);         } else if (isdigit(s[i])) {           s1.push_back( d );           cnt[2].push_back(i);         }       }       int num = 0;       for (int i = 0; i < 3; i++)         if (!cnt[i].size()) num++;       if (num == 0) {         cout << s <<   n ;         continue;       } else if (num == 1) {         for (int i = 0; i < 3; i++) {           if (!cnt[i].size()) {             for (int j = 1; j < 3; j++) {               if (cnt[(i + j) % 3].size() != 1) {                 if (i == 0)                   s[cnt[(i + j) % 3][0]] =  a ;                 else if (i == 1)                   s[cnt[(i + j) % 3][0]] =  A ;                 else if (i == 2)                   s[cnt[(i + j) % 3][0]] =  1 ;                 break;               }             }             break;           }         }       } else if (num == 2) {         for (int i = 0; i < 3; i++) {           if (cnt[i].size()) {             if (i == 0) {               s[0] =  A ;               s[1] =  1 ;             } else if (i == 1) {               s[0] =  a ;               s[1] =  1 ;             } else if (i == 2) {               s[0] =  A ;               s[1] =  a ;             }             break;           }         }       }       cout << s <<   n ;     }     return 0;   }   