object Main {
  def main(args: Array[String]) {
    val sc = new java.util.Scanner(System.in)
    val char = sc.next()
    val vowel = Set("a", "i", "u", "e", "o")
    if (vowel contains char) {
      println("vowel")
    } else {
      println("consonant")
    }
  }
}