/**
 * @author karayuu
 */
fun main(args: Array<String>) {
    val filterList = mutableListOf('a', 'e', 'i', 'o', 'u')

    val input = readLine()!!.toCharArray().first()
    if (filterList.contains(input)) {
        println("vowel")
    } else {
       println("consonant")
    }
}