public class Practical_7
{
public static void main(String[] args)
{
int alpha1 = 'A' + (int)(Math.random() * ('Z' - 'A'));
int alpha2 = 'A' + (int)(Math.random() * ('Z' - 'A'));
int alpha3 = 'A' + (int)(Math.random() * ('Z' - 'A'));
int digit1 = (int)(Math.random() * 10);
int digit2 = (int)(Math.random() * 10);
int digit3 = (int)(Math.random() * 10);
int digit4 = (int)(Math.random() * 10);
System.out.println("" + (char)(alpha1) + ((char)(alpha2)) +
((char)(alpha3)) + digit1 + digit2 + digit3 + digit4);
}
}