input: def most_common_fruit(fruit_list: List[str]) -> str:
      """
      Given a list of fruit names, return the most common fruit name.
      >>> most_common_fruit(['Apple', 'Orange', 'Apple', 'Pineapple', 'Grape', 'Apple'])
      'Apple'
      >>> most_common_fruit(['Pineapple', 'Orange', 'Pineapple', 'Grape', 'Grape'])
      'Pineapple'
      """
output:     fruit_count = {}
      for fruit in fruit_list:
          if fruit in fruit_count:
              fruit_count[fruit] += 1
          else:
              fruit_count[fruit] = 1
      
      most_common = max(fruit_count, key=fruit_count.get)
      return most_common