diff --git a/KuzminskiyAA/Task 1/Dogs/Data/main.py b/KuzminskiyAA/Task 1/Dogs/Data/main.py
new file mode 100644
index 0000000..148494c
--- /dev/null
+++ b/KuzminskiyAA/Task 1/Dogs/Data/main.py	
@@ -0,0 +1,53 @@
+def ll_insert(head, name, phone):
+    """Вставка в конец списка. Возвращает голову."""
+    new_node = {'name': name, 'phone': phone, 'next': None}
+    
+    if head is None:
+        return new_node
+    
+    current = head
+    while current['next']:
+        if current['name'] == name:
+            current['phone'] = phone
+            return head
+        current = current['next']
+    
+    if current['name'] == name:
+        current['phone'] = phone
+    else:
+        current['next'] = new_node
+    
+    return head
+
+def ll_find(head, name):
+    current = head
+    while current:
+        if current['name'] == name:
+            return current['phone']
+        current = current['next']
+    return None
+
+def ll_delete(head, name):
+    if head is None:
+        return None
+    
+    if head['name'] == name:
+        return head['next']
+    
+    current = head
+    while current['next']:
+        if current['next']['name'] == name:
+            current['next'] = current['next']['next']
+            return head
+        current = current['next']
+    
+    return head
+
+def ll_list_all(head):
+    entries = []
+    current = head
+    while current:
+        entries.append((current['name'], current['phone']))
+        current = current['next']
+    entries.sort(key=lambda x: x[0])
+    return entries
\ No newline at end of file