iya iya buka buka tu
iya iya buka buka tu .
i j a WORD_BOUNDARY  i j a WORD_BOUNDARY b u k a WORD_BOUNDARY b u k a WORD_BOUNDARY t u WORD_BOUNDARY
i y a WORD_BOUNDARY i y a WORD_BOUNDARY b u k a WORD_BOUNDARY b u k a WORD_BOUNDARY t u WORD_BOUNDARY