#include <bits/stdc++.h>   using namespace std;   int main() {     string s;     cin >> s;     for (int i = 0; i < s.length(); i++) {       if (s[i] !=  a  && s[i] !=  e  && s[i] !=  i  && s[i] !=  o  &&           s[i] !=  u  && s[i] !=  n ) {         if (i != s.length() - 1) {           if (s[i + 1] !=  a  && s[i + 1] !=  e  && s[i + 1] !=  i  &&               s[i + 1] !=  o  && s[i + 1] !=  u ) {             cout <<  NO  << endl;             return 0;           }         } else {           cout <<  NO  << endl;           return 0;         }       }     }     cout <<  YES  << endl;     return 0;   }   