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

console.log('What\'s your age ? ')
process.stdin.on('data', function(myAge) {

  if (isNaN(Number(myAge))) {
    console.log(myAge + ' is not a number ..');

  } else if ( myAge > 99 ) {
  console.log( 'You are too old !!' )

  } else if ( ( myAge < 99 ) && ( myAge > 0) ) {
    var year = new Date().getFullYear();
    var birth = year - myAge;
    console.log( 'You were born in ' + birth + ' !' )
  }
      process.exit()

});