# Write your Python code here
print("hello Everyone")
#input


while True:
  marks = input("Enter your marks")
  print(marks)

  marksInt = int(marks)


  grade = ''

  if marksInt < 30:
    grade = 'C+'
  elif marksInt < 45:
    grade = 'C'
  elif marksInt < 60:
    grade = 'B+'
  elif marksInt < 75:
    grade = 'B'
  elif marksInt < 90:
    grade = 'A'
  else:
    grade = 'A+'

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