dokkara ireru no ka naa
dokkara ireru no ka naa ?
d o k k a r a WORD_BOUNDARY i r e r ɯ WORD_BOUNDARY n o WORD_BOUNDARY k a WORD_BOUNDARY n aː WORD_BOUNDARY
d o k k a r a WORD_BOUNDARY i r e r u WORD_BOUNDARY n o WORD_BOUNDARY k a WORD_BOUNDARY n a a WORD_BOUNDARY