func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int k;     cin >> k;     if (k < 25) {       cout << -1 << endl;     } else {       int r = 0, c = 0;       for (int i = 5; i <= sqrt(k); i++) {         if (k % i == 0) {           r = i;           c = k / i;           break;         }       }       if (r == 0 or c == 0) {         cout << -1 << endl;       } else {         char ch[] = { a ,  e ,  i ,  o ,  u };         string fr =   ;         for (int j = 0; j < r; j++) {           for (int i = 0; i < c; i++) {             fr += ch[(j + i) % 5];           }         }         cout << fr << endl;       }     }   }   