#include <iostream> 
using namespace std; 
  
int main() 
{ 
  char grade; 
  cout << "What is your grade? [A, B, C, D, or F]: "; 
  cin >> grade; 
  cin.ignore(1000, 10); 
  
  if (grade == 'A') 
    cout << "Excellent" << endl; 
  else if (grade == 'B') 
    cout << "Good" << endl; 
  else if (grade == 'C') 
    cout << "Average" << endl; 
  else if (grade == 'D' || grade == 'F') 
    cout << "See you next year" << endl; 
  else 
    cout << "Invalid: " << grade << endl; 
}