itaiitai tte itteru yo wanwan
itaiitai tte itteru yo wanwan .
i t a i i t a i WORD_BOUNDARY t t e WORD_BOUNDARY i t t e r ɯ WORD_BOUNDARY j o WORD_BOUNDARY w a n w a n WORD_BOUNDARY
i t a i i t a i WORD_BOUNDARY t t e WORD_BOUNDARY i t t e r u WORD_BOUNDARY y o WORD_BOUNDARY w a n w a n WORD_BOUNDARY