import java.util.Scanner;

class AgeException extends Exception {
	
	public AgeException(String str) {
		System.out.println(str);
	}
}
public class AgeExcDemo {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.print("Enter ur age :: ");
		int age = s.nextInt();
		
		try {
			if(age < 18) 
				throw new AgeException("Invalid age");
			else
				throw new AgeException("Valid age");
		}
		catch (AgeException a) {
			System.out.println(a);
		}
	}
}