hdoj_2004

#include<stdio.h>
int main()
{
    int a;
    while(scanf("%d",&a)!=EOF){
        if(a>=&&a<=){
            printf("E\n");
        }
        else if(a>=&&a<=){
            printf("A\n");
        }
        else if(a>=&&a<=){
            printf("B\n");
        }
        else if(a>=&&a<=){
            printf("C\n");
        }
        else if(a>=&&a<=){
            printf("D\n");
        }
        else{
            printf("Score is error!\n");
        }

    }
}