tu sad tu sad tu sad
tu sad tu sad tu sad .
t̪ u WORD_BOUNDARY s a d̪ WORD_BOUNDARY t̪ u WORD_BOUNDARY s a d̪ WORD_BOUNDARY t̪ u WORD_BOUNDARY s a d̪ WORD_BOUNDARY
t u WORD_BOUNDARY s a d WORD_BOUNDARY t u WORD_BOUNDARY s a d WORD_BOUNDARY t u WORD_BOUNDARY s a d WORD_BOUNDARY . WORD_BOUNDARY