import java.time.LocalTime;

public class Main {
	public static void main(String[] args) {
		// Test
		String text = getTimeString(6, 30);
		System.out.println(text);

		text = getTimeString(18, 30);
		System.out.println(text);
	}

	static String getTimeString(int hour, int minute) {
		return LocalTime.of(hour, minute).toString();
	}
}