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 Kotlin (1.0.0) (judge verdict: Wrong Answer)

fun main(args: Array<String>) {
    val S = readLine()!!

    if(check(S))
        println("YES")
    else
        println("NO")
}

fun check(s:String) : Boolean
{
    var result : Boolean = false

    if(s == "dreamer" || s == "dream" || s == "erase" || s == "eraser")
        return true
        else {
            if(s.startsWith("dreamer") || s.startsWith("dream") || s.startsWith("erase") || s.startsWith("eraser"))
            {
                if(check(s.substring(7))) return true
                if(check(s.substring(5))) return true
                if(check(s.substring(5))) return true
                if(check(s.substring(6))) return true
            } 
        return false
    }
}