} else {
                    alphabets = new String[] { text.substring(i, i + 1) };
                }
                i++;
            }

            final List<StringBuilder> originBufList = deepCopyBufList(bufList);
            for (int j = 0; j < alphabets.length; j++) {
                if (j == 0) {
                    for (final StringBuilder buf : bufList) {
                        buf.append(alphabets[j]);