baibai tte itteru ne
baibai tte itteru ne .
b a i b a i WORD_BOUNDARY t t e WORD_BOUNDARY i t t e r ɯ WORD_BOUNDARY n e WORD_BOUNDARY
b a i b a i WORD_BOUNDARY t t e WORD_BOUNDARY i t t e r u WORD_BOUNDARY n e WORD_BOUNDARY