diff --git a/Backtracking/Sudoku.js b/Backtracking/Sudoku.js
index 6d529cc9dd..15d468a472 100644
--- a/Backtracking/Sudoku.js
+++ b/Backtracking/Sudoku.js
@@ -78,3 +78,4 @@ class Sudoku {
 }
 
 export { Sudoku }
+//nice code