my_list = [

  [],

  [],

  [],

  [],

  [],

  [],

  [],

  [],

  [],

  []

]

​

def hash_function(value):

  sum_of_chars = 0

  for char in value:

    sum_of_chars += ord(char)

​

  return sum_of_chars % 10

​

def add(name):

  index = hash_function(name)

  my_list[index].append(name)

​

def contains(name):

  index = hash_function(name)

  return my_list[index] == name

​

add('Bob')

add('Pete')

add('Jones')

add('Lisa')

add('Siri')

add('Stuart')

print(my_list)

​