coderjack
diff --git a/‎DIRECTORY.md‎
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diff --git a/‎bit_manipulation/README.md‎
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@@ -586,6 +586,7 @@
   * [Aho-Corasick](https://github.com/TheAlgorithms/Python/blob/master/strings/aho-corasick.py)
   * [Boyer Moore Search](https://github.com/TheAlgorithms/Python/blob/master/strings/boyer_moore_search.py)
   * [Check Pangram](https://github.com/TheAlgorithms/Python/blob/master/strings/check_pangram.py)
+  * [Is Palindrome](https://github.com/TheAlgorithms/Python/blob/master/strings/is_palindrome.py)
   * [Knuth Morris Pratt](https://github.com/TheAlgorithms/Python/blob/master/strings/knuth_morris_pratt.py)
   * [Levenshtein Distance](https://github.com/TheAlgorithms/Python/blob/master/strings/levenshtein_distance.py)
   * [Lower](https://github.com/TheAlgorithms/Python/blob/master/strings/lower.py)
 
@@ -0,0 +1,7 @@
+https://docs.python.org/3/reference/expressions.html#binary-bitwise-operations
+https://docs.python.org/3/reference/expressions.html#unary-arithmetic-and-bitwise-operations
+https://docs.python.org/3/library/stdtypes.html#bitwise-operations-on-integer-types
+
+https://wiki.python.org/moin/BitManipulation
+https://wiki.python.org/moin/BitwiseOperators
+https://www.tutorialspoint.com/python3/bitwise_operators_example.htm