Python Code

import random
import string

def random_characters(length=3):
    return ''.join(random.choices(string.ascii_lowercase + string.digits, k=length))

def encode(message):
    encoded_words = []
    for word in message.split():
        if len(word) >= 3:
            first_letter = word[0]
            rest_of_word = word[1:]
            coded_word = random_characters() + rest_of_word + first_letter + random_characters()
            encoded_words.append(coded_word)
        else:
            encoded_words.append(word[::-1])  # Reverse the string
    return ' '.join(encoded_words)

def decode(encoded_message):
    decoded_words = []
    for word in encoded_message.split():
        if len(word) < 3:
            decoded_words.append(word[::-1])  # Reverse the string
        else:
            # Remove 3 random characters from start and end
            trimmed_word = word[3:-3]
            if trimmed_word:
                last_letter = trimmed_word[-1]
                decoded_word = last_letter + trimmed_word[:-1]
                decoded_words.append(decoded_word)
            else:
                decoded_words.append(word)  # Handle empty string case
    return ' '.join(decoded_words)

print("\n=== Secret Code Language ===")
while True:
    print("\n1. Encode a Message")
    print("2. Decode a Message")
    print("3. Exit")

    choice = input("Select an option (1-3): ").strip()

    if choice == '1':
        message = input("Enter the message to encode: ")
        coded_message = encode(message)
        print(f"\nEncoded message: {coded_message}")
    elif choice == '2':
        encoded_message = input("Enter the message to decode: ")
        decoded_message = decode(encoded_message)
        print(f"\nDecoded message: {decoded_message}")
    elif choice == '3':
        print("Exiting the program. Goodbye!")
        break
    else:
        print("Invalid option! Please choose a valid option (1-3).")