diff --git a/9/advent_1.py b/9/advent_1.py
index 40b1dce..90c95a3 100755
--- a/9/advent_1.py
+++ b/9/advent_1.py
@@ -2,10 +2,11 @@
 
 import re
 
+
 def predict(numbers):
     print(numbers)
     result = []
-    for i in range(0,len(numbers)-1):
+    for i in range(0, len(numbers)-1):
         result.append(numbers[i+1]-numbers[i])
     if len(set(result)) == 1:
         print("ainult 1 tulemus")
@@ -25,4 +26,4 @@ for line in lines:
     print(x)
     y += x
 
-print(y)
\ No newline at end of file
+print(y)