890. Find and Replace Pattern

class Solution {
    public List<String> findAndReplacePattern(String[] words, String pattern) {
        List<String> result = new ArrayList<>();
        
        for(String word:words){
            if(matches(word,pattern)){
                result.add(word);
            }
        }
        
        return result;
    }
    
    private boolean matches(String word,String pattern){
        char[] patternToWord = new char[26];
        char[] wordToPattern = new char[26];
        
        for(int index = 0; index<word.length(); index++){
            char wordChar = word.charAt(index);
            char patternChar = pattern.charAt(index);
            
            if(patternToWord[patternChar-'a'] == 0){
                patternToWord[patternChar-'a'] = wordChar;
            }
            
            if(wordToPattern[wordChar-'a'] == 0){
                wordToPattern[wordChar-'a'] = patternChar;
            }
            
            if(patternToWord[patternChar-'a'] != wordChar || wordToPattern[wordChar-'a'] != patternChar){
                return false;
            }
        }
        
        return true;
    }
}