papa ni wa iwareteta no wa
papa ni wa iwareteta no wa ?
p a p a WORD_BOUNDARY n i WORD_BOUNDARY w a WORD_BOUNDARY i w a r e t e t a WORD_BOUNDARY n o WORD_BOUNDARY w a WORD_BOUNDARY
p a p a WORD_BOUNDARY n i WORD_BOUNDARY w a WORD_BOUNDARY i w a r e t e t a WORD_BOUNDARY n o WORD_BOUNDARY w a WORD_BOUNDARY