function main(input) {
  const a = input.split(' ');
  if(a[0]=='a'||a[0]=='i'||a[0]=='u'||a[0]=='e'||a[0]=='o'){
    console.log('vowel');
  }else{
    console.log('consonant');
  }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));
