import java.util.Scanner

object Main {
  def main(args:Array[String]): Unit = {
    val vowels = Array("a", "i", "u", "e", "o")
    val sc = new Scanner(System.in)

    if (vowels.contains(sc.nextLine())) {
      println("vowel")
    } else {
      println("consonant")
    }
  }
}