// Maximum-TNT

#include <iostream>
#include <string>
#include <sstream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <vector>
#include <algorithm>
#include <fstream>

using namespace std;

#define cin fin

const int BUFSIZE = 1024;
ifstream fin("say.txt");

bool IsBoin(char c)
{
    return (c == 'a' || c=='e' || c == 'i' || c == 'u' || c == 'o');
}

bool IsOK(string& str)
{
    int renzoku_boin=0,boin_flg=0;
    int renzoku_shiin=0;
    char prev=0;
    
    for(int i = 0 ; i < (int)str.size() ; i++)
    {
	if(IsBoin(str[i]))
	{
	    renzoku_boin++;
	    renzoku_shiin = 0;
	    boin_flg=1;
	}
	else
	{
	    renzoku_boin = 0;
	    renzoku_shiin++;
	}
	if(renzoku_boin > 2 || renzoku_shiin > 2)return false;
	if(prev != 'e' && prev != 'o' && str[i] == prev)return false;
	prev = str[i];
    }
    if(boin_flg == 0)return false;
    return true;
}

int main()
{
    string str;
    while(getline(cin,str) , str != "end")
    {
	cout << "<" << str << ">" << " is ";
	if(!IsOK(str))cout << "not ";
	cout << "acceptable." << endl;
    }
    return 0;
}