fun main(args: Array<String>) {
    val c = readLine()!!
    val vo = listOf("a","i","u","e","o")
    
    var ans = false
    vo.forEach {
        if (c == it) {
            ans = true
        }
    }
    if (ans) {
        print("vowel")
    } else {
        print("consonant")
    }
}