Swaps letters within words

wordFucker.py

import random
import re

#Text to be Encoded
text = "This is a test sentance this should come out garbled but readable"

#Regex to strip out any special characters
regex = re.compile('[^a-zA-Z ]')
cleaned = regex.sub('', text)

#Spliting string into array of all words in input
split = cleaned.split(" ")

#Loop over every word
for x,value in enumerate(split):
    
    #If is long enough to swap middle letters
    if len(value) > 3:
        # Only loop from 1 to one before last
        # using -2 since -1 is the last and -2 is before last
        for i in range(1,len(value)-2):
            # i is first character to swap
            # swap_index is second character to swap
            swap_index = random.randint(1,len(value)-2)
            
            # Convert letters to array since 
            # String is imutable
            letters = list(split[x])
            # Temporary storage so we don't lose first char
            # When swapping
            temp = letters[i] 
            
            # Swaping Letters
            letters[i] = letters[swap_index]
            letters[swap_index] = temp
            
            # Reconecting split lettters into string to 
            # Override old string
            letters = "".join(letters)
            
            # Putting string back into words list
            split[x] = letters

# Joining Words back into string from array to print
print(" ".join(split))