public class TestGrade { 
	public static void main(String[] args) {
		int score=89;
		char ch;
		if(score>=90)
			ch='A';
		else if(score>=80)
			ch='B';
			else if(score>=70)
					ch='C';
				else if(score>=60)
					ch='D';
				    else
					ch='E';
	System.out.println("ȼ"+ch);
	}
}
