#include <bits/stdc++.h>
int main() {
  bool flag = false;
  char word;
  std::vector<char> vowel{'a', 'i', 'u', 'e', 'o'};
  std::cin >> word;
  for (int i = 0; i < 5; i++) {
    if (word == vowel[i]) {
      flag = true;
    }
  }
  if (false == flag) {
    std::cout << "consonant" << std::endl;
  } else {
    std::cout << "vowel" << std::endl;
  }
  return 0;
}
