input: 
  from typing import List
  
  
  def dot_product(list1: List[int], list2: List[int]) -> int:
      """Calculates the dot product of two lists.
      >>> dot_product([1,2], [3,4])
      11
      >>> dot_product([5], [2])
      10
      """
      product = 0
      for i in range(len(list1)):
          product += (list1[i] * list2[i])
      return product
  
output:     product = 0
      for i in range(len(list1)):
          product += (list1[i] * list2[i])
      return product