Spelling words~

class Solution {
    public boolean isInclude(String s,String chars){
       for(int i = 0;i<s.length();i++){
           String s1 = s.charAt(i)+"";
           if(!chars.contains(s1)){
               return false;
           }
           int ret = chars.indexOf(s1);
            chars = chars.replaceFirst(s1,"-1");
       }
       return true;
    }
    public int countCharacters(String[] words, String chars) {
        int  k = 0;
        for(String s : words){
            boolean flg = false;
            flg =  isInclude(s,chars);
            if(flg == true){
                k+=s.length(); 
            }
        }
        return k;
    }

}