public class Notes {

    public static void main(String[] args) {

        float result = 7.5f;

        if(result >= 10){
            System.out.println("A+");
        }else if(result >= 9){
            System.out.println("A");
        }else if (result >= 7) {
            System.out.println("B+");
        }else if (result >= 6) {
            System.out.println("B");
        }else if (result >= 5.5) {
            System.out.println("B-");
        }else if (result >=5 ) {
            System.out.println("C");
        }else if (result >=0 ) {
            System.out.println("F");
        }

        System.out.println("End");
}
}