# Write your Python code here
print("Hello, Excelrs!")
gradelist[]
for i in range(4):
  print("Hello, Excelrs!")
  marks=int(input("enter your marks"))
  print(marks)
  grade=''
  if(marks>90):
   grade='A'
  elif(marks>80):
   grade='B'
  elif(marks>60):
   grade='C'
  elif(marks>40):
   grade='D'
  else:
   grade='E'
  print("your grade is:", grade)
  gradelist append{grade}
print(gradelist)