process.stdin.resume()
process.stdin.setEncoding('utf8')

console.log('What\'s your age ? ')
process.stdin.on('data', (age) => {
  const birthYear = new Date().getFullYear() - age;

  if (isNaN(age) || age > 99){
    console.log('You must enter a number less than 99 !!!! ')
    process.exit()
  } else if (birthYear === 2019){
    console.log('ERROR !! You can not enter 0')
    process.exit()
  } else {
    console.log('You were born in '+ birthYear)
    process.exit()
  }
})