Thus, for the above-mentioned pair of cognates, (exhaustiv, esaustivo), we extract the following features around any type of mismatch in the alignment, when n = 2: x>s ex>es xh>s-h>-xh>s-ha>-a ->o v->vo -$>o$ For identical features we account only once.
because there is one feature (xh>s-) which occurs twice in our example, we have eight features for the pair (exhaustiv, esaustivo).