diff --git a/DIRECTORY.md b/DIRECTORY.md
index 55b270624..b1a23a239 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -1197,7 +1197,6 @@
   * [Rabin Karp](strings/rabin_karp.py)
   * [Remove Duplicate](strings/remove_duplicate.py)
   * [Reverse Letters](strings/reverse_letters.py)
-  * [Reverse Long Words](strings/reverse_long_words.py)
   * [Reverse Words](strings/reverse_words.py)
   * [Snake Case To Camel Pascal Case](strings/snake_case_to_camel_pascal_case.py)
   * [Split](strings/split.py)
diff --git a/strings/reverse_letters.py b/strings/reverse_letters.py
index 10b8a6d72..4f73f816b 100644
--- a/strings/reverse_letters.py
+++ b/strings/reverse_letters.py
@@ -1,19 +1,24 @@
-def reverse_letters(input_str: str) -> str:
+def reverse_letters(sentence: str, length: int = 0) -> str:
     """
-    Reverses letters in a given string without adjusting the position of the words
-    >>> reverse_letters('The cat in the hat')
-    'ehT tac ni eht tah'
-    >>> reverse_letters('The quick brown fox jumped over the lazy dog.')
-    'ehT kciuq nworb xof depmuj revo eht yzal .god'
-    >>> reverse_letters('Is this true?')
-    'sI siht ?eurt'
-    >>> reverse_letters("I   love       Python")
-    'I evol nohtyP'
+    Reverse all words that are longer than the given length of characters in a sentence.
+    If unspecified, length is taken as 0
+
+    >>> reverse_letters("Hey wollef sroirraw", 3)
+    'Hey fellow warriors'
+    >>> reverse_letters("nohtyP is nohtyP", 2)
+    'Python is Python'
+    >>> reverse_letters("1 12 123 1234 54321 654321", 0)
+    '1 21 321 4321 12345 123456'
+    >>> reverse_letters("racecar")
+    'racecar'
     """
-    return " ".join([word[::-1] for word in input_str.split()])
+    return " ".join(
+        "".join(word[::-1]) if len(word) > length else word for word in sentence.split()
+    )
 
 
 if __name__ == "__main__":
     import doctest
 
     doctest.testmod()
+    print(reverse_letters("Hey wollef sroirraw"))
diff --git a/strings/reverse_long_words.py b/strings/reverse_long_words.py
deleted file mode 100644
index 39ef11513..000000000
--- a/strings/reverse_long_words.py
+++ /dev/null
@@ -1,21 +0,0 @@
-def reverse_long_words(sentence: str) -> str:
-    """
-    Reverse all words that are longer than 4 characters in a sentence.
-
-    >>> reverse_long_words("Hey wollef sroirraw")
-    'Hey fellow warriors'
-    >>> reverse_long_words("nohtyP is nohtyP")
-    'Python is Python'
-    >>> reverse_long_words("1 12 123 1234 54321 654321")
-    '1 12 123 1234 12345 123456'
-    """
-    return " ".join(
-        "".join(word[::-1]) if len(word) > 4 else word for word in sentence.split()
-    )
-
-
-if __name__ == "__main__":
-    import doctest
-
-    doctest.testmod()
-    print(reverse_long_words("Hey wollef sroirraw"))