class Solution {
    public String mostCommonWord(String paragraph, String[] banned) {
        String[] words =  paragraph.replaceAll("\\pP"," ").toLowerCase().split("\\s+");
        List<String> wordList = Arrays.asList(words);

        HashMap<String, Integer> map = new HashMap<>();
        wordList.stream().map(str -> str.trim()).forEach(str -> map.compute(str, (k, v) -> v == null ? 1 : v + 1));

        for(String bw : banned){
            if(map.containsKey(bw)){
                map.remove(bw);
            }
        }

        String ans = "";
        int max = 0;
        for(var kvp : map.entrySet()){
            if(kvp.getValue() > max){
                ans = kvp.getKey();
                max = kvp.getValue();
            }
        }

        return ans;
    }
}