public static String withoutStringn2(String base, String remove) {
        // return base.replaceAll(remove,"").replaceAll(remove.toUpperCase(),"").replaceAll(remove.toLowerCase(),"");
        int indexR = 0;
        int start = -1;
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < base.length(); i++) {
            if (Character.toLowerCase(base.charAt(i)) == Character.toLowerCase(remove.charAt(indexR))) {
                if (start == -1) {
                    start = i;
                }
                indexR++;
                if (indexR == remove.length()) {
                    indexR = 0;
                    start = -1;
                }
            } else {
                if (start != -1) {
                    for (int j = start; j < i; j++) {
                        builder.append(base.charAt(j));
                    }
                    indexR = 0;
                    start = -1;
                }
                builder.append(base.charAt(i));
            }
        }

        if (start != -1) {
            for (int j = start; j < base.length(); j++) {
                builder.append(base.charAt(j));
            }

        }

        return builder.toString();

    }