'use strict'

function main(s) {

  const c = s.split('\n')[0];
  const set = new Set(['a', 'e', 'i', 'o', 'u'])

  const ans = (set.has(c)) ? 'vowel' : 'consonant';

  console.log(ans);
}

main(require("fs").readFileSync("/dev/stdin", "utf8"));
