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

console.log('What\'s your age ? ')
process.stdin.on('data', (userAge) => {
const year = 2018
const yOb = year - userAge

if (userAge >=0 && userAge <= 99 && Number.isInteger(yOb)) {
    console.log("Your year of birth is" + " " + yOb)
} else {
    console.log("Wrong Entry")
}
  process.exit()
})