# Write your Python code here
print("Hello, Excelrs!")
# Write your Python code here

class student:
 
  def __init__(self,name,marks):
  self.name = name
  self.marks = marks
  self.grade = ""

  def calculateGrade(self):
  if self.marks < 40:
   self.grade = "D"
  elif self.marks < 60:
                     self.grade = "C"
                       elif self.marks < 80:
                           self.grade = "B"
                             else: 
                                 self.grade = "A"

                                  def displayGrade(self):
                                    print(self.grade)
                                st1 = student("st1",40)
                                    st2 = student("st2",55)
                                    st3 = student("st3",70)
                                    st4 = student("st4",85)
                                    st5 = student("st5",75)

                                    st1.calculateGrade()
                                    st1.displayGrade()

                                    st2.calculateGrade()
                                    st2.displayGrade()

                                    st3.calculateGrade()
                                    st3.displayGrade()
                                     
                                     st4.calculateGrade()
                                     st4.displayGrade()

                                     st5.calculateGrade()
                                     st5.displayGrade()