diff --git a/BudakovIS/docs/LinkedListPhoneBook.py b/BudakovIS/docs/LinkedListPhoneBook.py
index c0d65eb..de0656d 100644
--- a/BudakovIS/docs/LinkedListPhoneBook.py
+++ b/BudakovIS/docs/LinkedListPhoneBook.py
@@ -256,6 +256,12 @@ print("====== END TEST ====== \n\n\n")
 
 
 
+def find_min(node):
+    while node['left'] is not None:
+        node = node['left']
+    return node
+
+
 def bst_delete(root,name):
     if root is None:
         return None