tralala la la la la
tralala la la la la .
t r a l a l a WORD_BOUNDARY l a WORD_BOUNDARY l a WORD_BOUNDARY l a WORD_BOUNDARY l a WORD_BOUNDARY
t r a l a l a WORD_BOUNDARY l a WORD_BOUNDARY l a WORD_BOUNDARY l a WORD_BOUNDARY l a WORD_BOUNDARY . WORD_BOUNDARY