#include <stdio.h>
#include <ctype.h>
int main() {
  char grade;

  printf("Enter grade letter in Caps: ");
  scanf("%c", &grade);
  grade = toupper(grade);
  switch(grade) {
    case 'A':
      
    case 'B':
      printf("Good\n");
      break;
    case 'C':
          
    case 'D':
      printf("pass\n");
      break;
    case 'F':
      printf("fail\n");
      break;
    default:
      printf("Confused\n");
      break;
  }
  return 0;
}