#include <iostream>
using namespace std;

int main()
{
    char c;
    int isLowercaseVowel;
cin >> c;
isLowercaseVowel = (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u');
if (isLowercaseVowel)
     cout <<  "vowel.";
    else
        cout <<" consonant.";

    return 0;
}