#include <stdio.h>

int main(void)
{
    char Grade;
    int ACount = 0;
    int BCount = 0;
    int i;

    for (i = 1; i <= 10; i++)
    {
        fprintf(stdout, "Please Enter Grade of Student %d:\n", i);
        fflush(stdin);
        Grade = getchar();

        if (Grade = 'A' || Grade = 'a')
            ACount++;
        else if (Grade = 'B' || Grade = 'b')
            BCount++;
        else
        {
            fputs("Please Enter 'A' or 'B' Grade Only!\n", stdout);
        }
    }

    if (ACount <= 2)
        fputs("Your class is poor\n", stdout);
    else if (ACount <= 7)
        fputs("Your class is good!\n", stdout);
    else if (ACount >= 8)
        fputs("Your class is brilliant!\n", stdout);

    return 0;
}