input: def deleteDuplicates(numbers: List[int]) -> List[int]:
      """
      Deletes all duplicates in a given list of numbers.
      
      >>> deleteDuplicates([1, 2, 3, 2, 4, 5, 4])
      [1, 2, 3, 4, 5]
      >>> deleteDuplicates([5, 6, 7, 8, 5, 6])
      [5, 6, 7, 8]
      """
      final_list = []
      for num in numbers:
          if num not in final_list:
              final_list.append(num)
      return final_list
output:     final_list = []
      for num in numbers:
          if num not in final_list:
              final_list.append(num)
      return final_list