import io.{StdIn => in}

object Main extends App {
  val ans = in.readLine match {
    case "a" => "vowel"
    case "i" => "vowel"
    case "e" => "vowel"
    case "u" => "vowel"
    case "o" => "vowel"
    case _   => "consonant"
  }
  println(ans)
}