kaikai kaikai kaikai kaikai
kaikai kaikai kaikai kaikai .
k a i k a i WORD_BOUNDARY k a i k a i WORD_BOUNDARY k a i k a i WORD_BOUNDARY k a i k a i WORD_BOUNDARY
k a i k a i WORD_BOUNDARY k a i k a i WORD_BOUNDARY k a i k a i WORD_BOUNDARY k a i k a i WORD_BOUNDARY