bi bi bi cali cali cali cali
bi bi bi cali cali cali cali .
β i WORD_BOUNDARY β i WORD_BOUNDARY β i WORD_BOUNDARY k a l i WORD_BOUNDARY k a l i WORD_BOUNDARY k a l i WORD_BOUNDARY k a l i WORD_BOUNDARY
b i WORD_BOUNDARY b i WORD_BOUNDARY b i WORD_BOUNDARY c a l i WORD_BOUNDARY c a l i WORD_BOUNDARY c a l i WORD_BOUNDARY c a l i WORD_BOUNDARY . WORD_BOUNDARY