#include <bits/stdc++.h>
long long const MAX = 1e5 + 5;
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  string s;
  cin >> s;
  long long n = s.length();
  for (long long i = 0; i < n - 1; i++) {
    if (s[i] == 'n') continue;
    if (s[i] != 'a' && s[i] != 'e' && s[i] != 'i' && s[i] != 'o' &&
        s[i] != 'u') {
      if (s[i + 1] != 'a' && s[i + 1] != 'e' && s[i + 1] != 'i' &&
          s[i + 1] != 'o' && s[i + 1] != 'u')
        return cout << "No", 0;
      ;
    }
  }
  if (s[n - 1] != 'a' && s[n - 1] != 'e' && s[n - 1] != 'i' &&
      s[n - 1] != 'o' && s[n - 1] != 'u' && s[n - 1] != 'n')
    return cout << "No", 0;
  ;
  return cout << "Yes", 0;
  ;
}
