import java.util.*;
public class Main
{
public static void main(String[] args)
{
int user, pass;
do
{
System.out.print("Enter a user: ");
user = Integer.parseInt(new Scanner(System.in).nextLine());
System.out.print("Enter a password: ");
pass = Integer.parseInt(new Scanner(System.in).nextLine());
if ((user != 12) || (pass != 1234))
{
System.out.println("Login Error");
}
} while ((user != 12) || (pass != 1234));
System.out.println("Login successful");
}
}