import java.util.Scanner

object A049 {
  def main(args: Array[String]): Unit = {
    val sc = new Scanner(System.in)
    val c = sc.next()
    val ans = c match {
      case "a" | "e" | "i" | "o" | "u" => "vowel"
      case _ => "consonant"
    }
    println(ans)
  }
}
