diff --git a/Basics/13_read_write_file.py b/Basics/13_read_write_file.py
index a44786bc..d441ff46 100644
--- a/Basics/13_read_write_file.py
+++ b/Basics/13_read_write_file.py
@@ -9,7 +9,7 @@ def count_num_in_file(file_path, num):
 
 def count_num_in_tokens(tokens, num):
     count = 0
-    for token in tokens:
+    for token in token:
         if num == int(token):
             count+=1
     return count
@@ -31,4 +31,4 @@ def sum_tokens(tokens):
         sum += int(token)
     return sum
 
-sum_numbers("C:\\Code\\Py\\Basics\\input.txt")
\ No newline at end of file
+sum_numbers("C:\\Code\\Py\\Basics\\input.txt")