#include <bits/stdc++.h>
using namespace std;
char s[105];
int main(void) {
  cin >> s;
  int n = strlen(s);
  for (int i = 0; i < n; i++) {
    if (!(s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
          s[i] == 'u') &&
        s[i] != 'n') {
      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;
      }
    }
  }
  cout << "YES" << endl;
  return 0;
}
