diff --git a/labs02/task03.py b/labs02/task03.py
index a1c3a85..b5e2e5f 100644
--- a/labs02/task03.py
+++ b/labs02/task03.py
@@ -13,7 +13,12 @@ jak 'set', która przechowuje elementy bez powtórzeń.)
 
 
 def oov(text, vocab):
-    pass
+    list_of_words = []
+    text_splitted = text.split(' ')
+    for word in text_splitted:
+        if word.lower() not in vocab:
+            list_of_words.append(word)
+    return set(list_of_words)