ri wa nai kara
ri wa ar kara
n:let ptl:top v:ir ptl:conj
ri wa nai kara .
r i WORD_BOUNDARY w a WORD_BOUNDARY n a i WORD_BOUNDARY k a r a WORD_BOUNDARY
r i WORD_BOUNDARY w a WORD_BOUNDARY n a i WORD_BOUNDARY k a r a WORD_BOUNDARY