Fix build issues due to count (#5725)

* Fix build issues due to count

* Update check_anagrams.py

strings/check_anagrams.py

@@ -2,6 +2,7 @@
 wiki: https://en.wikipedia.org/wiki/Anagram
 """
 from collections import defaultdict
+from typing import DefaultDict
 
 
 def check_anagrams(first_str: str, second_str: str) -> bool:
@@ -29,7 +30,7 @@ def check_anagrams(first_str: str, second_str: str) -> bool:
         return False
 
     # Default values for count should be 0
-    count = defaultdict(int)
+    count: DefaultDict[str, int] = defaultdict(int)
 
     # For each character in input strings,
     # increment count in the corresponding