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

const anneeCourante = 2018;
let age = 0;

console.log('What\'s your age ? ');

process.stdin.on('data', (age) => {
	if (isNaN(age)) {
		console.log("Value must be a number, learn to read N@@b");
  		process.exit();
	}
	else if (age > 99 || age <= 0) {
		console.log("this test doesn\'t apply to mummies or unborns :o");
	  	process.exit();
	}
	else {
		let	DoB = (anneeCourante - age);
		DoB = Math.round(DoB);
		console.log("ah so you\'re born in " + DoB);
		process.exit();
	}
})