#include<bits/stdc++.h>
using namespace std;
set<char> s;
int main()
{
    char c;
	s.insert('a');s.insert('e');s.insert('i');s.insert('o');s.insert('u');
	cin>>c;
	if(s.find(c)!=s.end()) cout<<"vowel"<<endl;
	else cout<<"consonant"<<endl;
	return 0;
}
