class LGTest {
	public static void main(String[] args) {
		// bad!  LetterGrade lg = new LetterGrade();	
		LetterGrade lg = LetterGrade.A;

		System.out.println(lg);

		LetterGrade lg2 = LetterGrade.valueOf("A");
		System.out.println(lg2);

		LetterGrade[] list = LetterGrade.values();
		for(LetterGrade grade : list) {
			System.out.println(grade);
		}	
	
	}
}