Quick challenge

Quick challenge after work, avoiding putting a front end on the lego app sigh.

package com.company;

import java.util.ArrayList;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {

    public static void main(String[] args) {
        String inputText = "The legend, propagated by email and message boards, purportedly demonstrates that readers can understand the "
        + "meaning of words in a sentence even when the interior letters of each word are scrambled. As long as all the necessary letters "
        + "are present, and the first and last letters remain the same, readers appear to have little trouble reading the text.";
        String aPattern = "\\w+";
        Pattern pattern = Pattern.compile(aPattern);
        Matcher matcher = pattern.matcher(inputText);
        ArrayList<String> words = new ArrayList<>();
        while (matcher.find()) {
            words.add(matcher.group());
        }

        StringBuilder outputWords = new StringBuilder(inputText.length());
        String shuffledWord, middle;
        char firstLetter, lastLetter;
        for (String word : words) {
            if(word.length() > 3) {
                //build messed up words keeping edges same
                firstLetter = word.charAt(0);
                lastLetter = word.charAt(word.length()-1);
                middle = wordShuffler(word.substring(1, word.length() - 1));
                shuffledWord = firstLetter + middle + lastLetter;
            } else {
                shuffledWord = word;
            }
            outputWords.append(shuffledWord);
        }


        String nonWord = "\\W+";
        pattern = Pattern.compile(nonWord);
        matcher = pattern.matcher(inputText);
        while (matcher.find()) {
            outputWords.insert(matcher.start(), matcher.group());
        }

        System.out.println(inputText);
        System.out.println(outputWords);
    }

    public static String wordShuffler(String wordToShuffle) {
        char[] letterArray = wordToShuffle.toCharArray();
        Random random = new Random();
        int nextValue;
        char swap;

        for (int i = 0; i < letterArray.length; i++) {
            swap = letterArray[i];
            nextValue = random.nextInt(letterArray.length);
            letterArray[i] = letterArray[nextValue];
            letterArray[nextValue] = swap;
        }
        return new String(letterArray);
    }
}