aku coba aku coba
aku coba aku coba .
a k u WORD_BOUNDARY t̠ʃ o b a WORD_BOUNDARY a k u WORD_BOUNDARY t̠ʃ o b a WORD_BOUNDARY
a k u WORD_BOUNDARY c o b a WORD_BOUNDARY a k u WORD_BOUNDARY c o b a WORD_BOUNDARY . WORD_BOUNDARY