input: 
  def list_to_dict_mapper(items: List[int]) -> Dict[int, str]:
      """ Convert a list of integers into a dictionary where the keys are the integers 
      and the values are their string representations.
      >>> list_to_dict_mapper([1, 2, 3, 4])
      {1: 'one', 2: 'two', 3: 'three', 4: 'four'}
      """
  
output:     number_to_word = {
          1: 'one',
          2: 'two',
          3: 'three',
          4: 'four',
          5: 'five',
          6: 'six',
          7: 'seven',
          8: 'eight',
          9: 'nine',
          10: 'ten'
      }
      
      return {item: number_to_word.get(item, 'unknown') for item in items}