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

-----Response-----
RESPONSE (User Message):
USER QUERY: Decode a list of hex-encoded messages using a Caesar cipher with a shift of 4, reverse them, and find the numerical maximum value of these decoded strings. Assume the decoded strings represent integers. The hex-encoded messages are ['313233', '343536', '373839'].
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
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------Action------
THOUGHT:
Before writing the code to decode the hex-encoded messages, I need to find the relevant functions for decoding hex strings and applying a Caesar cipher in the codebase. I will start by searching for functions related to decoding hex strings and Caesar cipher in the `message_decoder.py` file.
ACTION TYPE:
search
ACTION CONTENT:
(file_path: m3eval\/message_decoder.py) AND (type: FUNCTION) AND (text: hex)
(file_path: m3eval\/message_decoder.py) AND (type: FUNCTION) AND (text: caesar)

-----Response-----
RESPONSE (Retrieval Result):
QUERY:
(file_path: m3eval\/message_decoder.py) AND (type: FUNCTION) AND (text: hex)

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:
(file_path: m3eval\/message_decoder.py) AND (type: FUNCTION) AND (text: caesar)

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 with a Caesar cipher shift of 4, reverse the decoded strings, and then find the maximum numerical value. I will write the code step by step, starting with decoding the hex strings to ASCII.
ACTION TYPE:
code
ACTION CONTENT:
from m3eval.message_decoder import convert_hex_to_ascii, caesar_decode

# Hex-encoded messages
hex_messages = ['313233', '343536', '373839']

# Decode hex messages to ASCII
ascii_messages = [convert_hex_to_ascii(hex_message) for hex_message in hex_messages]

# Apply Caesar cipher with a shift of 4 to each message
shift = 4
decoded_messages = [caesar_decode(ascii_message, shift) for ascii_message in ascii_messages]

# Reverse the decoded strings
reversed_messages = [decoded_message[::-1] for decoded_message in decoded_messages]

# Convert reversed messages to integers and find the maximum value
int_messages = [int(reversed_message) for reversed_message in reversed_messages]
final_answer = max(int_messages)

final_answer

-----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 0x7f89b8609a80>, "caesar_decode": <function caesar_decode at 0x7f89b8609940>, "hex_messages": ['313233', '343536', '373839'], "ascii_messages": ['123', '456', '789'], "shift": 4, "decoded_messages": ['123', '456', '789'], "reversed_messages": ['321', '654', '987'], "int_messages": [321, 654, 987], "final_answer": 987}

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

------Action------
THOUGHT:
The code executed without error and the variable `final_answer` contains the correct maximum value of the decoded and reversed strings. The task is complete.
ACTION TYPE:
done
ACTION CONTENT:
True

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