import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class AuthenticationException extends Exception {
	
	public AuthenticationException(String message) {
		
		super(message);
	}
}

public class AuthenticationExcDemo {

	public static void main(String[] args) {

		InputStreamReader isr = new InputStreamReader(System.in);
		BufferedReader br = new BufferedReader(isr);
		String pwd;
		
		try {
			
			System.out.print("Enter password :: ");
			pwd = br.readLine();
			
			if(!pwd.equals("123")) 
				throw new AuthenticationException("Incorrect password\nType correct password");
			else
				System.out.println("Welcome User !!!");
			
		} 
		catch (IOException e) {
			e.printStackTrace();
		} 
		catch (AuthenticationException a) {
			a.printStackTrace();
		}
		System.out.println("BYE BYE");
	}

}