# Write your Python code here

marks = input("Enter your marks")
print(marks)

marksInt = int(marks)

grade = ''

if marksInt < 40:
  grade = 'D'
elif marksInt < 60:
  grade = 'C'
elif marksInt < 80:
  grade = 'B'
else:
  grade = 'A'

print("your grade is")
print(grade)