diff --git a/kyu_3/rail_fence_cipher_encoding_and_decoding/encoding_and_decoding.py b/kyu_3/rail_fence_cipher_encoding_and_decoding/encoding_and_decoding.py
index 410e96fa921..682d979917b 100644
--- a/kyu_3/rail_fence_cipher_encoding_and_decoding/encoding_and_decoding.py
+++ b/kyu_3/rail_fence_cipher_encoding_and_decoding/encoding_and_decoding.py
@@ -9,7 +9,7 @@
 def get_rails(string: str, n: int) -> list:
     """
     Create rails matrix.
-    
+
     :param string: str
     :param n: int, the number of rails
     :return: list, rails matrix