ibu sama mama kan sama
ibu sama mama kan sama .
i b u WORD_BOUNDARY s a m a WORD_BOUNDARY m a m a WORD_BOUNDARY k a n WORD_BOUNDARY s a m a WORD_BOUNDARY
i b u WORD_BOUNDARY s a m a WORD_BOUNDARY m a m a WORD_BOUNDARY k a n WORD_BOUNDARY s a m a WORD_BOUNDARY