#include<stdio.h>
#include<ctype.h>
int main()
{
    char c;
    scanf("%c",&c);
    if(!isalpha(c))
    {
        printf("Invalid input");
        return 0;
    }
    else(c=='a'||c=='A'||c=='e'||c=='E'||c=='i'||c=='I'||C=='o'||c=='O'||c=='u'||c=='U')
    {
        printf("vowels");
    }
    else
    {
        printf("consonants");
    }
    return o;
}