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

console.log('How old are you ? ')
process.stdin.on('data', (age) => {
    if (typeof(age) == 'number'){
        if (age>0 && age<99) {
            if ((2019-age)<2019){
            return (2019 - age);
            }
        }
    }
  console.log('You are born in ' + (2019-age))
  process.exit()
})