diff --git a/komissarovgo/docs/data/CodePhoneBook.py b/komissarovgo/docs/data/CodePhoneBook.py
index 77d0fac..66dfdf0 100644
--- a/komissarovgo/docs/data/CodePhoneBook.py
+++ b/komissarovgo/docs/data/CodePhoneBook.py
@@ -63,4 +63,42 @@ def ll_list_all(head):
         records.append((current['name'], current['phone']))
         current = current['next']
     records.sort(key=lambda x: x[0])
+    return records
+
+# 2. Hash Function
+
+def hash_function(name, table_size):
+    return sum(ord(c) for c in name) % table_size
+
+
+def ht_create(size=1000):
+    return [None] * size
+
+
+def ht_insert(buckets, name, phone):
+    size = len(buckets)
+    index = hash_function(name, size)
+    buckets[index] = ll_insert(buckets[index], name, phone)
+
+
+def ht_find(buckets, name):
+    size = len(buckets)
+    index = hash_function(name, size)
+    return ll_find(buckets[index], name)
+
+
+def ht_delete(buckets, name):
+    size = len(buckets)
+    index = hash_function(name, size)
+    buckets[index] = ll_delete(buckets[index], name)
+
+
+def ht_list_all(buckets):
+    records = []
+    for bucket in buckets:
+        current = bucket
+        while current is not None:
+            records.append((current['name'], current['phone']))
+            current = current['next']
+    records.sort(key=lambda x: x[0])
     return records
\ No newline at end of file