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

// console.log('What\'s your name ? ')
// process.stdin.on('data', (text) => {
//   console.log('Hello ' + text)
//   process.exit()
// })
console.log('How old are you ?')
process.stdin.on('data', (number) =>{
if (number <= 100 && number > 0){
    number = 2019 - number
    console.log(number)
    }else {
    console.log("You're not human")
    }

    process.exit()
})