input: 
  def print_grade_table(students):
      """
      Print a formatted table of grades for a given set of students.
      
      >>> print_grade_table([{'name': "John", 'grade': 92}, {'name': "Alice", 'grade': 95}, {'name': "Bob", 'grade': 87}])
      Name    Grade
      -------------
      John    92
      Alice   95
      Bob     87
      """
  
output:     print("Name    Grade")
      print("-------------")
      for student in students:
          print(f"{student['name']:<8}{student['grade']}")