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 C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main(void) {
	static const char isBoin[256] = {
		['a'] = 1, ['e'] = 1, ['i'] = 1, ['o'] = 1, ['u'] = 1
	};
	char c[4];
	if (scanf("%3s", c) != 1) return 1;
	puts(isBoin[(unsigned char)c[0]] ? "vowel" : "consonant");
	return 0;
}