# Write your Python code here
students = []

for i in range(3):
  name = input("Enter student name: ")
  marks = int(input("Enter marks: "))

  if marks >= 90:
    grade = "A"
  elif marks >= 80:
    grade = "B"
  elif marks >= 70:
    grade = "C"
  elif marks >= 60:
    grade = "D"
  else:
    grade = "Fail"
  
  student = {
    "name":name,
    "marks":marks,
    "grade":grade
  }

  students.append(student)

print("\nStudent Details")

for student in students:
   print(student)