diff --git a/Day-21/jo.bt.py b/Day-21/job.py
similarity index 88%
rename from Day-21/jo.bt.py
rename to Day-21/job.py
index 011749b..f790323 100644
--- a/Day-21/jo.bt.py
+++ b/Day-21/job.py
@@ -11,4 +11,4 @@
 
 print(sen.split(","))
 
-print(sen.isdigit())
\ No newline at end of file
+print(sen.isdigit())