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: Wrong Answer)

#include <stdio.h>
#include <string.h>

int main(void) {
  char c[] = "", vowel[5][2] = {"a", "e", "i", "o", "u"};
  int i = 0;

  scanf("%s", &c[0]);

  while (i <= 4) {
    if (strcmp(vowel[i], c) == 0) {
      printf("vowel\n");
      break;
    }
    
    i++;
    
    if (i == 5) {
      printf("consonant\n");
    }
  }
  
  return 0;
}