t um t um t um
t um t um t um .
t̪ e WORD_BOUNDARY ũ WORD_BOUNDARY t̪ e WORD_BOUNDARY ũ WORD_BOUNDARY t̪ e WORD_BOUNDARY ũ WORD_BOUNDARY
t WORD_BOUNDARY u m WORD_BOUNDARY t WORD_BOUNDARY u m WORD_BOUNDARY t WORD_BOUNDARY u m WORD_BOUNDARY . WORD_BOUNDARY