#include <iostream>
#include <string>
#include <fstream>

using namespace std;

#define FNAME "say.txt"
#define cin fin

ifstream fin(FNAME);

bool isVowel( char ch ) {
	switch ( ch ) {
	case 'a': case 'e': case 'i': case 'o': case 'u': return true;
	default: return false;
	}
}

bool isAcceptable( string &W ) {
	const static char vowel[] = {'a', 'e', 'i', 'o', 'u'};

	bool containVowel = false;
	for ( int i = 0; i < W.size(); i++ )
		containVowel |= isVowel(W[i]);
	if ( !containVowel ) return false;

	int nconsVowel = 0, nconsCons = 0;
	for ( int i = 0; i < W.size(); i++ ) {
		if ( isVowel(W[i]) )
			nconsVowel++, nconsCons = 0;
		else
			nconsCons++, nconsVowel = 0;

		if ( nconsVowel == 3 || nconsCons == 3 ) return false;
	}

	for ( int i = 1; i < W.size(); i++ )
		if ( W[i] == W[i-1] && W[i] != 'e' && W[i] != 'o' ) return false;
	return true;
}

int main() {
	string word;

	while ( cin >> word && word != "end" ) {
		if ( isAcceptable(word) )
			cout << "<" << word << "> is acceptable." << endl;
		else
			cout << "<" << word << "> is not acceptable." << endl;
	}

	return 0;
}