import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
	public static void main(String[] args) {
		DateTimeFormatter dtf = DateTimeFormatter.ofPattern("MMM dd, uuuu 'at' h:mm a", new Locale("vi", "VN"));
		System.out.println(LocalDateTime.of(2021, 8, 4, 10, 20).format(dtf));
		System.out.println(LocalDateTime.of(2021, 8, 4, 20, 30).format(dtf));
	}
}