input: 
  from typing import List, Dict
  
  def print_grade_table(students: List[Dict[str, str]]) -> None:
      """Print a formatted table of student grades.
      >>> 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']:<12}{student['grade']}")