grades = [92,88,85,79,72,72,14]
count = 0
done = False
while(not done and len(grades) >= 1):
	if (grades[count] >= 90):
		print(str(grades[count])+': A')
	elif (80 <= grades[count] < 90):
		print(str(grades[count])+': B')
	elif (70 <= grades[count] < 80):
		print(str(grades[count])+': C')
	elif (60 <= grades[count] < 70):
		print(str(grades[count])+': D')
	else:
		print(str(grades[count])+': F')

	#completely unrelated
	if(count >= len(grades)-1 ):
		# turn it off!
		done = True
	else:
		# get the next item in the list
		count += 1