#include <iostream>
#include <iomanip>
#include <vector>
#include <string>
#include <queue>
#include <map>
#include <set>
#include <string>
#include <algorithm>
#include <cmath>
#include <unordered_map>

using namespace std;
#define ll long long
#define nl endl
#define cy cout << "YES\n"
#define cn cout << "NO\n"
#define sz s.size()

void sherry()
{
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
#endif
}
int main()
{
    sherry();
    string s;
    cin >> s;
    bool flag = true;
    for (int i = 0; i < sz; i++)
    {
        s[i] = tolower(s[i]);
        s[i + 1] = tolower(s[i + 1]);

        if (s[i] != 'a' && s[i] != 'o' && s[i] != 'u' && s[i] != 'i' && s[i] != 'e' && s[i] != 'n')
        {
            if (s[i + 1] != 'a' && s[i + 1] != 'o' && s[i + 1] != 'u' && s[i + 1] != 'i' && s[i + 1] != 'e')
            {
                cn;
                flag = false;
                break;
            }
        }
    }
    if (flag)
        cy;
}