#include<stdio.h>
int main()
{
    char c;
    scanf("%c",&c);
    if((c=='a')||(c=='e')||(c=='i')||(c=='o')||(c=='u'))
    {
        printf("vowel\n");
    }


    else
    {
        printf("consonent\n");
    }
    return 0;
}
