prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Concatenate/consolidate all algorithms with different implementations
  ### Feature description
  
  There are lots of algorithms with the same concept but different implementations/methods in different files. All these should be moved into one file
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `strings/reverse_letters.py`
  Content:
  ```
  1 def reverse_letters(input_str: str) -> str:
  2     """
  3     Reverses letters in a given string without adjusting the position of the words
  4     >>> reverse_letters('The cat in the hat')
  5     'ehT tac ni eht tah'
  6     >>> reverse_letters('The quick brown fox jumped over the lazy dog.')
  7     'ehT kciuq nworb xof depmuj revo eht yzal .god'
  8     >>> reverse_letters('Is this true?')
  9     'sI siht ?eurt'
  10     >>> reverse_letters("I   love       Python")
  11     'I evol nohtyP'
  12     """
  13     return " ".join([word[::-1] for word in input_str.split()])
  14 
  15 
  16 if __name__ == "__main__":
  17     import doctest
  18 
  19     doctest.testmod()
  20
  ```
  
  Path: `strings/reverse_long_words.py`
  Content:
  ```
  1 def reverse_long_words(sentence: str) -> str:
  2     """
  3     Reverse all words that are longer than 4 characters in a sentence.
  4 
  5     >>> reverse_long_words("Hey wollef sroirraw")
  6     'Hey fellow warriors'
  7     >>> reverse_long_words("nohtyP is nohtyP")
  8     'Python is Python'
  9     >>> reverse_long_words("1 12 123 1234 54321 654321")
  10     '1 12 123 1234 12345 123456'
  11     """
  12     return " ".join(
  13         "".join(word[::-1]) if len(word) > 4 else word for word in sentence.split()
  14     )
  15 
  16 
  17 if __name__ == "__main__":
  18     import doctest
  19 
  20     doctest.testmod()
  21     print(reverse_long_words("Hey wollef sroirraw"))
  22
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/strings/reverse_letters.py b/strings/reverse_letters.py
  --- 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
  --- 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"))
  
verification_info: {"golden_diff": "diff --git a/strings/reverse_letters.py b/strings/reverse_letters.py\n--- a/strings/reverse_letters.py\n+++ b/strings/reverse_letters.py\n@@ -1,19 +1,24 @@\n-def reverse_letters(input_str: str) -> str:\n+def reverse_letters(sentence: str, length: int = 0) -> str:\n     \"\"\"\n-    Reverses letters in a given string without adjusting the position of the words\n-    >>> reverse_letters('The cat in the hat')\n-    'ehT tac ni eht tah'\n-    >>> reverse_letters('The quick brown fox jumped over the lazy dog.')\n-    'ehT kciuq nworb xof depmuj revo eht yzal .god'\n-    >>> reverse_letters('Is this true?')\n-    'sI siht ?eurt'\n-    >>> reverse_letters(\"I   love       Python\")\n-    'I evol nohtyP'\n+    Reverse all words that are longer than the given length of characters in a sentence.\n+    If unspecified, length is taken as 0\n+\n+    >>> reverse_letters(\"Hey wollef sroirraw\", 3)\n+    'Hey fellow warriors'\n+    >>> reverse_letters(\"nohtyP is nohtyP\", 2)\n+    'Python is Python'\n+    >>> reverse_letters(\"1 12 123 1234 54321 654321\", 0)\n+    '1 21 321 4321 12345 123456'\n+    >>> reverse_letters(\"racecar\")\n+    'racecar'\n     \"\"\"\n-    return \" \".join([word[::-1] for word in input_str.split()])\n+    return \" \".join(\n+        \"\".join(word[::-1]) if len(word) > length else word for word in sentence.split()\n+    )\n \n \n if __name__ == \"__main__\":\n     import doctest\n \n     doctest.testmod()\n+    print(reverse_letters(\"Hey wollef sroirraw\"))\ndiff --git a/strings/reverse_long_words.py b/strings/reverse_long_words.py\ndeleted file mode 100644\n--- a/strings/reverse_long_words.py\n+++ /dev/null\n@@ -1,21 +0,0 @@\n-def reverse_long_words(sentence: str) -> str:\n-    \"\"\"\n-    Reverse all words that are longer than 4 characters in a sentence.\n-\n-    >>> reverse_long_words(\"Hey wollef sroirraw\")\n-    'Hey fellow warriors'\n-    >>> reverse_long_words(\"nohtyP is nohtyP\")\n-    'Python is Python'\n-    >>> reverse_long_words(\"1 12 123 1234 54321 654321\")\n-    '1 12 123 1234 12345 123456'\n-    \"\"\"\n-    return \" \".join(\n-        \"\".join(word[::-1]) if len(word) > 4 else word for word in sentence.split()\n-    )\n-\n-\n-if __name__ == \"__main__\":\n-    import doctest\n-\n-    doctest.testmod()\n-    print(reverse_long_words(\"Hey wollef sroirraw\"))\n", "issue": "Concatenate/consolidate all algorithms with different implementations\n### Feature description\n\nThere are lots of algorithms with the same concept but different implementations/methods in different files. All these should be moved into one file\n", "before_files": [{"content": "def reverse_letters(input_str: str) -> str:\n    \"\"\"\n    Reverses letters in a given string without adjusting the position of the words\n    >>> reverse_letters('The cat in the hat')\n    'ehT tac ni eht tah'\n    >>> reverse_letters('The quick brown fox jumped over the lazy dog.')\n    'ehT kciuq nworb xof depmuj revo eht yzal .god'\n    >>> reverse_letters('Is this true?')\n    'sI siht ?eurt'\n    >>> reverse_letters(\"I   love       Python\")\n    'I evol nohtyP'\n    \"\"\"\n    return \" \".join([word[::-1] for word in input_str.split()])\n\n\nif __name__ == \"__main__\":\n    import doctest\n\n    doctest.testmod()\n", "path": "strings/reverse_letters.py"}, {"content": "def reverse_long_words(sentence: str) -> str:\n    \"\"\"\n    Reverse all words that are longer than 4 characters in a sentence.\n\n    >>> reverse_long_words(\"Hey wollef sroirraw\")\n    'Hey fellow warriors'\n    >>> reverse_long_words(\"nohtyP is nohtyP\")\n    'Python is Python'\n    >>> reverse_long_words(\"1 12 123 1234 54321 654321\")\n    '1 12 123 1234 12345 123456'\n    \"\"\"\n    return \" \".join(\n        \"\".join(word[::-1]) if len(word) > 4 else word for word in sentence.split()\n    )\n\n\nif __name__ == \"__main__\":\n    import doctest\n\n    doctest.testmod()\n    print(reverse_long_words(\"Hey wollef sroirraw\"))\n", "path": "strings/reverse_long_words.py"}], "after_files": [{"content": "def reverse_letters(sentence: str, length: int = 0) -> str:\n    \"\"\"\n    Reverse all words that are longer than the given length of characters in a sentence.\n    If unspecified, length is taken as 0\n\n    >>> reverse_letters(\"Hey wollef sroirraw\", 3)\n    'Hey fellow warriors'\n    >>> reverse_letters(\"nohtyP is nohtyP\", 2)\n    'Python is Python'\n    >>> reverse_letters(\"1 12 123 1234 54321 654321\", 0)\n    '1 21 321 4321 12345 123456'\n    >>> reverse_letters(\"racecar\")\n    'racecar'\n    \"\"\"\n    return \" \".join(\n        \"\".join(word[::-1]) if len(word) > length else word for word in sentence.split()\n    )\n\n\nif __name__ == \"__main__\":\n    import doctest\n\n    doctest.testmod()\n    print(reverse_letters(\"Hey wollef sroirraw\"))\n", "path": "strings/reverse_letters.py"}, {"content": null, "path": "strings/reverse_long_words.py"}]}