tu tu tut tut tut tut
tu tu tut tut tut tut .
t u WORD_BOUNDARY t u WORD_BOUNDARY t u t WORD_BOUNDARY t u t WORD_BOUNDARY t u t WORD_BOUNDARY t u t WORD_BOUNDARY
t u WORD_BOUNDARY t u WORD_BOUNDARY t u t WORD_BOUNDARY t u t WORD_BOUNDARY t u t WORD_BOUNDARY t u t WORD_BOUNDARY . WORD_BOUNDARY