'''ASSIGNMENT'''



'''ACETOBACTER = int(input("Acetobacter scores")
BACILLUS = int(input(" BACILLUS scores ")
CLOSTRIDIUM = int(input("CLOSTRIDIUM scores ")              
DENETROPHY = int(input(" DENETROPHY scores ")
ESCHERICHIA COLI = int(input(" ESCHERICHIA COLI scores ")
FLORIDUIM = int(input(" ESCHERICHIA COLI scores ")

total = (ACETOBACTER+BACILLUS+CLOSTRIDIUM+DENETROPHY+ESCHERICHIA+COLIFLORIDIUM)
AVERAGE =(ACETOBACTER+BACILLUS+CLOSTRIDIUM+DENETROPHY+ESCHERICHIA+COLIFLORIDIUM)/2*100'''
                

score=int(input("give  me a score"))

print("grade calculator")
if (score >=70 and score <=100):
    print (" Your grade is A")

elif (score >=60 and score <=69):
    print ("Your grade is B")

elif (score >=50 and score <=59):
    print ("Your grade is C")
               
elif (score >=45 and score <=49):
    print ("Your grade is D")
                
elif (score >=40 and score <=44):
    print ("Your grade is E")
                
elif (score >=0 and score <=39):
    print ("Your grade is F")

else:
    print("nothing")
               
