diff --git a/bin/chertoy.py b/bin/chertoy.py
index 70e9436d232aebc565a77be00e2b0eb7672133b1..000b26be076e190926b3a22fe15748d7d3cd54f8 100644
--- a/bin/chertoy.py
+++ b/bin/chertoy.py
@@ -1,8 +1,10 @@
 #!/bin/env python3
+# -*- coding: utf-8 -*-
+
 #chertoy.py
 #
 #usage:
-#$ ./chertoy.py
+#$ ./chertoy.py < path to the project folder > < /name of the folder with your input data > < /name of your topics.txt file > < /name of your results.txt file > < /name of the output file you want to create in the folder with the project >
 # 
 #author: <Tatjana Chernenko, Utaemon Toyota>