ironna iro ga aru
ironna iro ga ar
adn n ptl:case v:ir
ironna iro ga aru .
i r o n n a WORD_BOUNDARY i r o WORD_BOUNDARY g a WORD_BOUNDARY a r ɯ WORD_BOUNDARY
i r o n n a WORD_BOUNDARY i r o WORD_BOUNDARY g a WORD_BOUNDARY a r u WORD_BOUNDARY