oto dake shika kikoenai
oto dake shika kikoenai .
o t o WORD_BOUNDARY d a k e WORD_BOUNDARY ʃ i k a WORD_BOUNDARY k i k o e n a i WORD_BOUNDARY
o t o WORD_BOUNDARY d a k e WORD_BOUNDARY s h i k a WORD_BOUNDARY k i k o e n a i WORD_BOUNDARY