#include <bits/stdc++.h>
using namespace std;
#define int long long
bool vowel(char c)
{
    string s="aouie";
    return count(s.begin(),s.end(),c);
}
signed main()
{
    string s;
    cin>>s;
    if(!vowel(s.back())&&s.back()!='n')
        cout<<"NO";
    else
    {
        for(int i=0;i<s.size()-1;i++)
        {
            if(s[i]=='n')
                continue;
            if(!vowel(s[i])&&!vowel(s[i+1]))
            {
                cout<<"NO";
                return 0;
            }
        }
        cout<<"YES";
    }
}
/*

oboboboboooooonb
b
*/