kuk kuk kuk kuk kuk au
kuk kuk kuk kuk kuk au .
k u k WORD_BOUNDARY k u k WORD_BOUNDARY k u k WORD_BOUNDARY k u k WORD_BOUNDARY k u k WORD_BOUNDARY a u WORD_BOUNDARY
k u k WORD_BOUNDARY k u k WORD_BOUNDARY k u k WORD_BOUNDARY k u k WORD_BOUNDARY k u k WORD_BOUNDARY a u WORD_BOUNDARY . WORD_BOUNDARY