kore wa nan yatta ka na
kore wa nan yatta ka na ?
k o r e WORD_BOUNDARY w a WORD_BOUNDARY n a n WORD_BOUNDARY j a t t a WORD_BOUNDARY k a WORD_BOUNDARY n a WORD_BOUNDARY
k o r e WORD_BOUNDARY w a WORD_BOUNDARY n a n WORD_BOUNDARY y a t t a WORD_BOUNDARY k a WORD_BOUNDARY n a WORD_BOUNDARY