diff --git a/labs02/task09.py b/labs02/task09.py
index 9045054..b8be093 100644
--- a/labs02/task09.py
+++ b/labs02/task09.py
@@ -9,7 +9,11 @@ Np. leet('leet') powinno zwrócić '1337'.
 
 
 def leet_speak(text):
-    pass
+    slownik = {'e' : '3', 'l' : '1', 'o': '0', 't' : '7'}
+    for i in text:
+        if i in slownik:
+            text = text.replace(i, slownik[i])
+    return text
 
 
 def tests(f):