diff --git a/BudakovIS/docs/LinkedListPhoneBook.py b/BudakovIS/docs/LinkedListPhoneBook.py
index bab135a..10f1ec8 100644
--- a/BudakovIS/docs/LinkedListPhoneBook.py
+++ b/BudakovIS/docs/LinkedListPhoneBook.py
@@ -119,7 +119,7 @@ print(ll_list_all(head))
 print("====== END ======")
 
 
-
+#============================== HASH FUNCTIONS =========================
 SIZE = 5
 buckets = [None] * SIZE
 
@@ -201,3 +201,38 @@ print("search Boris = ",ht_find(buckets, "Boris"))  # None
 
 # Все записи
 print("list all records: ",ht_list_all(buckets))
+print("====== END GLOBAL TEST ======\n\n\n")
+
+
+
+# ======================== TREE FUNC ====================
+
+def create_node(name,phone):
+    return {'name': name, 'phone': phone, 'left': None, 'right': None}
+
+print("====== START TREE FUNC CHAPTER ======\n\n")
+print("====== TEST CREATE NODE FUNC ======")
+root = create_node('Ivan', '123-456')
+print("Create Ivan node: ",root)
+print("====== END TEST ====== \n\n\n")
+
+def bst_insert(root, name, phone):
+    if root is None:
+        return create_node(name, phone)
+
+    if name == root['name']:
+        root[phone] = phone
+    elif name < root['name']:
+        root['left'] = bst_insert(root['left'], name, phone)
+    elif name >= root['name']:
+        root['right'] = bst_insert(root['right'], name , phone)
+    return root
+
+print("====== TEST INSERT FUNC ======")
+root = bst_insert(root, 'Dima', '456-789')
+print("add Dima: ", root)
+root = bst_insert(root, 'Boris', '789-123')
+print("add Boris: ", root)
+root = bst_insert(root, 'Eva', '321-123')
+print("add Eva: ", root)
+print("====== END TEST =======\n\n\n")