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>
void ABC42(void);
void ABC43(void);
void ABC44(void);
void ABC45(void);
void ABC46(void);
void ABC47(void);
void ABC48(void);
void ABC49(void);

int main(void){
    ABC49();
    return 0;
}

void ABC42(void){
    int a,b,c,n=0;
    scanf("%d %d %d",&a,&b,&c);
    if(a==7||b==7||c==7){
        if((a==5&&b==5)||(b==5&&c==5)||(c==5&&a==5)){
            printf("YES");
            n++;
    }}
    if(n==0)printf("NO");
}

void ABC43(void){
    int i,n,sum=0;
    scanf("%d",&n);
    for(i=1;i<=n;i++){
        sum+=i;
    }
    printf("%d",sum);
}

void ABC44(void){
    int n,k,x,y,i,sum=0;
    scanf("%d",&n);
    scanf("%d",&k);
    scanf("%d",&x);
    scanf("%d",&y);
    if(n>k){
        for(i=1;i<=k;i++)sum+=x;
        for(i=k+1;i<=n;i++)sum+=y;
    }else{
        for(i=1;i<=n;i++)sum+=x;
    }
    printf("%d",sum);
}

void ABC45(void){
    int a,b,h;
    scanf("%d",&a);
    scanf("%d",&b);
    scanf("%d",&h);
    printf("%d",(a+b)*h/2);
}

void ABC46(void){
    int a,b,c,n;
    scanf("%d %d %d",&a,&b,&c);
    if(a==b||b==c||c==a){
        n=2;
        if(a==b&&a==c)n=1;
    }else{
        n=3;
    }
    printf("%d",n);
}

void ABC47(void){
    int a,b,c;
    scanf("%d %d %d",&a,&b,&c);
    if((a+b==c)||(b+c==a)||(c+a==b)){
        printf("Yes");
    }else{
        printf("No");
    }
}

void ABC48(void){
    char str1[100],str2[100];
    scanf("%s %s",str1,str2);
    printf("A%c",str2[0]);
    printf("C");
}

void ABC49(void){
    char c;
    scanf("%c",&c);
    if(c=='a'||c=='i'||c=='u'||c=='e'||c=='o'){
        printf("vowel");
    }else{
        printf("consonant");
    }
}