tanca tanca tanca
tanca tanca tanca .
t̪ a n̺ k a WORD_BOUNDARY t̪ a n̺ k a WORD_BOUNDARY t̪ a n̺ k a WORD_BOUNDARY
t a n c a WORD_BOUNDARY t a n c a WORD_BOUNDARY t a n c a WORD_BOUNDARY . WORD_BOUNDARY