# Write your Python code here

#input 
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)

# #output 
# print("your r in grade B")

# #variable
# #datatype
# a = 10
# print(a)