public class Main
{
	public static void main(String[] args) {
	    double markah = 75;
        String Gred = "G";
        switch ((int) (markah / 10)) { //cast value to int
            // match multiple of 10
            // eg. 100 is 100/10=10.0, (int)10.0=10
            // eg. 95 is 95/10=9.5, (int)9.5=9
            // eg. 89 is 89/10=8.9, (int)8.9=8
            case 10:
            case 9:
                Gred = "A+";
                break;
            case 8:
                Gred = "A";
                break;
            case 7:
                switch ((int) (markah % 10 * 2 / 10)) {  //cast value to int
                    // match doubled remainder of 10 division
                    // eg. 71 is 71%10=1, 1x2=2, (int)2/10=0
                    // eg. 74 is 74%10=4, 4x2=8, (int)8/10=0
                    // eg. 75 is 75%10=5, 5x2=10, (int)10/10=1
                    // eg. 79 is 79%10=9, 9x2=18, (int)18/10=1
                    case 1:
                        Gred = "A+"; //75-79
                        break;
                    default:
                        Gred = "B+"; //70-74
                }
                break;
            case 6:
                switch ((int) (markah % 10 * 2 / 10)) {
                    case 1:
                        Gred = "B"; // 65-69
                        break;
                    default:
                        Gred = "C+"; //60-64
                }
                break;
            case 5:
                Gred = "C";
                break;
            case 4:
                switch ((int) (markah % 10 * 2 / 10)) {
                    case 1:
                        Gred = "D"; //45-49
                        break;
                    default:
                        Gred = "E"; //40-44
                }
                break;
            default:
                Gred = "G";
        }
        System.out.println(Gred);
	}
}