ku ku ku ku ku ku ku
ku ku ku ku ku ku ku .
k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY
k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY k u WORD_BOUNDARY . WORD_BOUNDARY