tora ni naru no da
tora ni naru no da .
t o r a WORD_BOUNDARY n i WORD_BOUNDARY n a r ɯ WORD_BOUNDARY n o WORD_BOUNDARY d a WORD_BOUNDARY
t o r a WORD_BOUNDARY n i WORD_BOUNDARY n a r u WORD_BOUNDARY n o WORD_BOUNDARY d a WORD_BOUNDARY