'use strict';

const receive = require('fs').readFileSync('/dev/stdin', 'utf8').split(/\s/);

const main = input => {
  const c = input[0];

  const temp = ['a', 'i', 'u', 'e', 'o'].indexOf(c);
  const ans = !(temp === -1) ? 'vowel' : 'consonant';

  console.log(ans);
};

main(receive);
