mienai yo piyopiyo piyopiyo
mienai yo piyopiyo piyopiyo .
m i e n a i WORD_BOUNDARY j o WORD_BOUNDARY p i j o p i j o WORD_BOUNDARY p i j o p i j o WORD_BOUNDARY
m i e n a i WORD_BOUNDARY y o WORD_BOUNDARY p i y o p i y o WORD_BOUNDARY p i y o p i y o WORD_BOUNDARY