function Main(input){

  var c = String(input);
  c = c.replace(/[ａ-ｚ]/g, function(s) {
    return String.fromCharCode(s.charCodeAt(0) - 65248);
    });

  if( c === 'a' || c === 'i' || c === 'u' || c === 'e' || c === 'o') {
      console.log('vowel');
  } else {
    console.log('consonant');
  }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));