'use strict'

const main = input => {
	const c = input.trim()
	if (c === 'a') console.log('vowel')
	else if (c === 'e') console.log('vowel')
	else if (c === 'i') console.log('vowel')
	else if (c === 'o') console.log('vowel')
	else if (c === 'u') console.log('vowel')
	else console.log('consonant')
}

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