#include <bits/stdc++.h>
using namespace std;
string s;
int main(){
    while(cin >> s){
        if(s == "end") break;
        bool hasVowel = false, isImp = false;
        int vow = 0, con = 0;
        for(int i = 0; i < s.size(); i++){
            if(s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u'){
                hasVowel = true;
                vow++;
                con = 0;
            } else {
                con++;
                vow = 0;
            }
            
            if(vow >= 3 || con >= 3) isImp = true;
            if(i < s.size() + 1 && s[i] != 'e' && s[i] != 'o' && s[i] == s[i + 1]) isImp = true;
        }
        if(hasVowel && !isImp) cout << "<" << s << "> is acceptable.\n";
        else cout << "<" << s << "> is not acceptable.\n";
    }
}