K U kuku B A A kuku
k u kuku b a a kuku .
k WORD_BOUNDARY u WORD_BOUNDARY k u k u WORD_BOUNDARY b WORD_BOUNDARY a WORD_BOUNDARY a WORD_BOUNDARY k u k u WORD_BOUNDARY
k WORD_BOUNDARY u WORD_BOUNDARY k u k u WORD_BOUNDARY b WORD_BOUNDARY a WORD_BOUNDARY a WORD_BOUNDARY k u k u WORD_BOUNDARY . WORD_BOUNDARY