// https://atcoder.jp/contests/abc049/tasks/abc049_a
// AtCoder Beginner Contest 049
// A - 居合を終え、青い絵を覆う

function main(arg) {
  const c = arg.trim();
  
  switch (c) {
  case 'a':
  case 'e':
  case 'i':
  case 'o':
  case 'u':
    console.log('vowel');
    break;
  default:
    console.log('consonant');
  }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));
