diff --git a/labs02/task09.py b/labs02/task09.py
index 9045054..200d121 100644
--- a/labs02/task09.py
+++ b/labs02/task09.py
@@ -9,9 +9,17 @@ Np. leet('leet') powinno zwrócić '1337'.
 
 
 def leet_speak(text):
+    replacements = ( ('e','3'), ('l','1'),
+                 ('o','0'), ('o','7') )
+    my_string = text
+    new_string = my_string
+    for old, new in replacements:
+        new_string = new_string.replace(old, new)
+    return new_string
     pass
 
 
+
 def tests(f):
     inputs = [['leet'], ['do not want']]
     outputs = ['1337', 'd0 n07 wan7']