#include <fstream>
#include <iostream>
#include <string>
using namespace std;

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

int main()
{
  ifstream cin("say.txt");

  for (;;){
    string s;cin>>s;
    int i;
    if (s=="end") break;

    bool have_vow=false;
    bool two=false;
    bool three=false;
    bool vow=is_vow(s[0]);
    int cnt=1;
    for (i=0;i<s.length();i++){
      char c=s[i];
      if (is_vow(c)){
        have_vow=true;
        break;
      }
    }

    if (!have_vow) goto _dame;

    for (i=1;i<s.length();i++){
      if (vow!=is_vow(s[i])){
        vow=is_vow(s[i]);
        cnt=1;
      }
      else{
        cnt++;
        if (cnt==3){
          three=true;
          break;
        }
      }
    }
    if (three) goto _dame;

    for (int i=0;i<s.length()-1;i++){
      if (s[i]==s[i+1]&&s[i]!='e'&&s[i]!='o'){
        two=true;
        break;
      }
    }
    if (two) goto _dame;

    cout<<"<"<<s<<">"<<" is acceptable."<<endl;
    continue;
  _dame:;
    cout<<"<"<<s<<">"<<" is not acceptable."<<endl;
  }
  return 0;
}