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

console.log("How old are you?")
process.stdin.on('data', (age) => {
  let year = 2018;
  if (age <= 99) {
     console.log(year - age);
  }
  else {
      console.log("Sorry, there is an error")
  }
   process.exit()
})