Problem:
Score : 100 points

Problem Statement

Given a lowercase English letter c, determine whether it is a vowel. Here, there are five vowels in the English alphabet: a, e, i, o and u.

Constraints

c is a lowercase English letter.

Input

The input is given from Standard Input in the following format:

c

Output

If c is a vowel, print vowel. Otherwise, print consonant.

Sample Input 1

a

Sample Output 1

vowel

Since a is a vowel, print vowel.

Sample Input 2

z

Sample Output 2

consonant

Sample Input 3

s

Sample Output 3

consonant

Solution in OCaml (4.02.3) (judge verdict: Accepted)

open Printf
open Scanf

let solve c =
  let ls = ['a'; 'e'; 'i'; 'o'; 'u'] in
  if List.mem c ls then "vowel" else "consonant"

let () =
  scanf "%c " solve |> printf "%s\n"