#include<stdio.h>
#include<iostream>
using namespace std;
int main()
{
	char c;
	//while(scanf("%c",&c)!=EOF)
	{
	cin>>c;
	//getchar();
	if(c=='a'||c=='e'||c=='i'||c=='o'||c=='u')
	printf("vowel");
	else
	printf("consonant");
	}
	
}