843. guess the word

class Solution {
    public void findSecretWord(String[] wordlist, Master master) {
        for (int i = 0, x = 0; i < 10 && x < 6; i++) {
            Map<String, Integer> countZeroMatches = new HashMap<>();
            for (String word1: wordlist) {
                for (String word2: wordlist) {
                    if (match(word1, word2) == 0) {
                        countZeroMatches.put(word1, countZeroMatches.getOrDefault(word1, 0) + 1);
                    }
                }
            }
            int min = 1000;
            String minZeroMatchesWord = "";
            for (String word: wordlist) {
                if (countZeroMatches.getOrDefault(word, 0) < min) {
                    min = countZeroMatches.getOrDefault(word, 0);
                    minZeroMatchesWord = word;
                }
            }
            x = master.guess(minZeroMatchesWord);
            List<String> wordlist2 = new ArrayList<>();
            for (String word: wordlist) {
                if (match(minZeroMatchesWord, word) == x) {
                    wordlist2.add(word);
                }
            }
            wordlist = wordlist2.toArray(new String[0]);
        }
    }
    
    private int match(String word1, String word2) {
        int count = 0;
        for (int i = 0; i < word1.length(); i++) {
            if (word1.charAt(i) == word2.charAt(i)) count++;
        }
        return count;
    }
}