#Grade Program
#Shehu Muhammad
#February 5, 2018

grade = float(input("What was your grade? "))

#if grade < 90:
    #print("Bad Grade")
#else:
    #print("Good Grade")

if (grade >= 90):
    print("Great Grade")
elif(grade >= 80 and grade <=89):
    print("Good Grade")
elif(grade >= 70 and grade <=79):
    print("Okay Grade")
elif(grade >=0 and grade <=69):
    print("Bad Grade")
else:
    print("Impossible Grade")
    
    
    
