func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int k, rt, i, j;     char a[] = { a ,  e ,  i ,  o ,  u };     cin >> k;     rt = (int)sqrt(k);     for (; k % rt != 0; rt--)       ;     if (rt > 4) {       for (i = 0; i != k / rt; i++) {         for (j = 0; j != rt; j++) {           cout << a[(i + j) % 5];         }       }     } else       cout <<  -1 ;   }   