#include <iostream>
  
int main()
{
    char grade;
    std::cout << "Enter your letter grade (ABCDF): ";
    std::cin >> grade;
    switch (grade)
    {
    case 'A':
        std::cout << "Finally!\n";
        break;
    case 'B':  
        std::cout << "You can do better!\n";
        break;
    case 'C':  
        std::cout << "I'm disappointed in you!\n";
        break;
    case 'D':  
        std::cout << "You're not smart!\n";
        break;
    case 'F':  
        std::cout << "Get out of my sight!\n";
        break;
    default: 
        std::cout << "That's not even a grade!\n";
        break;
    }
    return 0;
}