Update typo.md

snippets/countVowels.md

@@ -9,11 +9,11 @@ import re
 
 
 def countVowels(str):
-    return len(len(re.findall(r'[aeiou]', 'bcedfidsnoxluAEIO', re.IGNORECASE)))
+    return len(len(re.findall(r'[aeiou]', str, re.IGNORECASE)))
 
 ```
 
 ``` python
 countVowels('foobar') # 3
 countVowels('gym') # 0
-```
+```