********************************************************************************
Step 1
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------Action------
THOUGHT:
None
ACTION TYPE:
None
ACTION CONTENT:
None

-----Response-----
RESPONSE (User Message):
USER QUERY: Given three hex-encoded messages, decode each one using the Caesar cipher with a shift of 6. Find the message that has a length equal to 5 after decoding. The hex-encoded messages are ['646566', '6a6b6c6d', '68696a6b6c'].
Save the final answer in the variable `final_answer`.

Use the code base located at `/root/m3eval/m3eval` to solve this query. Your current directory is `/root/playground`.

If the import path in retrieved code block says `testing/dir_name/file_name.py` and you want to import variable, function or class called `obj` from this file, then import using `from testing.dir_name.file_name import obj`.

The code base path has either been installed via pip or has been already been added to the system path via
```
import sys
sys.path.extend(['/root/m3eval'])
```

********************************************************************************
Step 2
********************************************************************************

------Action------
THOUGHT:
First, I need to find the functions for decoding hex strings and Caesar cipher in the `message_decoder.py` file. I will start by searching for functions related to hex decoding and Caesar cipher decoding in the codebase.
ACTION TYPE:
search
ACTION CONTENT:
(type: FUNCTION) AND (text: hex) AND (file_path: *message_decoder.py)
(type: FUNCTION) AND (text: caesar) AND (file_path: *message_decoder.py)

-----Response-----
RESPONSE (Retrieval Result):
QUERY:
(type: FUNCTION) AND (text: hex) AND (file_path: *message_decoder.py)

CODE BLOCKS:
---
file_path=m3eval/message_decoder.py
lines=[0, 3]
type=FUNCTION
content={
def convert_hex_to_ascii(hex_string: str):
    ascii_string = bytes.fromhex(str(hex_string)).decode('utf-8')
    return ascii_string
}
---
(All code blocks matching the query were returned.)

QUERY:
(type: FUNCTION) AND (text: caesar) AND (file_path: *message_decoder.py)

CODE BLOCKS:
---
file_path=m3eval/message_decoder.py
lines=[9, 17]
type=FUNCTION
content={
def caesar_decode(message: str, shift: int):
    """Caesar cipher decoder."""
    shift = int(shift)
    decoded = ''.join(chr((ord(char) - shift - 65) % 26 + 65)
                      if char.isupper() else chr((ord(char) - shift - 97) % 26 + 97)
                      if char.islower() else char
                      for char in message)
    return decoded
}
---
(All code blocks matching the query were returned.)

********************************************************************************
Step 3
********************************************************************************

------Action------
THOUGHT:
The search results returned the functions `convert_hex_to_ascii` and `caesar_decode` from the `message_decoder.py` file. I will use these functions to decode the hex-encoded messages using the Caesar cipher with a shift of 6 and then find the message with a length of 5. I will write the code to import these functions and process the messages accordingly.
ACTION TYPE:
code
ACTION CONTENT:
from m3eval.message_decoder import convert_hex_to_ascii, caesar_decode

# Hex-encoded messages
hex_messages = ['646566', '6a6b6c6d', '68696a6b6c']

# Decode each message using the Caesar cipher with a shift of 6
decoded_messages = [caesar_decode(convert_hex_to_ascii(hex_msg), 6) for hex_msg in hex_messages]

# Find the message that has a length equal to 5 after decoding
final_answer = next((msg for msg in decoded_messages if len(msg) == 5), None)

-----Response-----
RESPONSE (Execution Result):
CODE EXECUTED WITHOUT ERROR, STDOUT WAS EMPTY
RELEVANT VARIABLES (only shown if string rep. has changed after code exec):
{"convert_hex_to_ascii": <function convert_hex_to_ascii at 0x7f89b860d080>, "caesar_decode": <function caesar_decode at 0x7f89b860d300>, "hex_messages": ['646566', '6a6b6c6d', '68696a6b6c'], "decoded_messages": ['xyz', 'defg', 'bcdef'], "final_answer": bcdef}

********************************************************************************
Step 4
********************************************************************************

------Action------
THOUGHT:
The code executed without error and the variable `final_answer` contains the decoded message with a length of 5, which is 'bcdef'. The task is completed successfully.
ACTION TYPE:
done
ACTION CONTENT:
True

-----Response-----
None