diff --git a/labs02/task09.py b/labs02/task09.py
index 9045054..28b9c01 100644
--- a/labs02/task09.py
+++ b/labs02/task09.py
@@ -9,8 +9,16 @@ Np. leet('leet') powinno zwrócić '1337'.
 
 
 def leet_speak(text):
-    pass
+    slownik = {'e':3, 'l':1, 'o':0, 't':7}
+    dekod = ''
 
+    for znak in text:
+        if znak in slownik:
+            dekod += slownik[znak]
+        else:
+            dekod += znak
+
+    return dekod
 
 def tests(f):
     inputs = [['leet'], ['do not want']]