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

const YEAR = 2018
console.log('What\'s your age ?')

process.stdin.on('data', function (age) {
  if (age > 0 && age <= 99) {
    age = parseInt(age)
  }
  if (typeof age !== 'number') {
    process.stdout.write('Do you know how to read?')
    process.exit()
  } else {
    let birthYear = YEAR - age
    process.stdout.write('You are born in ' + birthYear + '!')
    process.exit()
  }
})