func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     cin >> s;     int h = -1, e = -1, l1 = -1, l2 = -1, o = -1;     for (int i = 0; i < s.size(); i++) {       if (s[i] ==  h ) {         h = i;         break;       }     }     if (h == -1)       cout <<  NO ;     else {       for (int j = h + 1; j < s.size(); j++) {         if (s[j] ==  e ) {           e = j;           break;         }       }       if (e == -1)         cout <<  NO ;       else {         for (int k = e + 1; k < s.size(); k++) {           if (s[k] ==  l ) {             l1 = k;             break;           }         }         if (l1 == -1)           cout <<  NO ;         else {           for (int l = l1 + 1; l < s.size(); l++) {             if (s[l] ==  l ) {               l2 = l;               break;             }           }           if (l2 == -1)             cout <<  NO ;           else {             for (int m = l2 + 1; m < s.size(); m++) {               if (s[m] ==  o ) {                 o = m;                 break;               }             }             if (o == -1)               cout <<  NO ;             else               cout <<  YES ;           }         }       }     }   }   