diff --git a/SolovevDD/zadanie11.py b/SolovevDD/zadanie11.py
new file mode 100644
index 0000000..7465463
--- /dev/null
+++ b/SolovevDD/zadanie11.py
@@ -0,0 +1,70 @@
+def ll_insert(head, name, phone):
+    if head is None:
+        return {'name': name, 'phone': phone, 'next': None}
+
+    curr = head
+    while True:
+        if curr['name'] == name:
+            curr['phone'] = phone
+            return head
+        
+        if curr['next'] is None:
+            break
+        
+        curr = curr['next']
+
+    curr['next'] = {'name': name, 'phone': phone, 'next': None}
+    return head
+
+def ll_find(head, name):
+    curr = head
+    while curr is not None:
+        if curr['name'] == name:
+            return curr['phone']
+        curr = curr['next']
+    return None
+
+def ll_delete(head, name):
+    if head is None:
+        return None
+
+    if head['name'] == name:
+        return head['next']
+
+    curr = head
+    while curr['next'] is not None:
+        if curr['next']['name'] == name:
+            curr['next'] = curr['next']['next']
+            return head
+        curr = curr['next']
+
+    return head
+
+def ll_list_all(head):
+    res = []
+    curr = head
+    while curr is not None:
+        res.append((curr['name'], curr['phone']))
+        curr = curr['next']
+    
+    res.sort(key=lambda x: x[0])
+    return res
+
+if __name__ == "__main__":
+    book = None
+
+    book = ll_insert(book, "Маша", "8900111")
+    book = ll_insert(book, "Саша", "8900222")
+    book = ll_insert(book, "Даша", "8900333")
+
+    print(ll_list_all(book))
+
+    book = ll_insert(book, "Маша", "0000000")
+    print(ll_list_all(book))
+
+    print(ll_find(book, "Саша"))
+    print(ll_find(book, "Петя"))
+
+    book = ll_delete(book, "Маша")
+    book = ll_delete(book, "Саша")
+    print(ll_list_all(book))
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