Mm - hmm.
and so I wrote a little Matlab script that calculates that and so I 'm gonna sort of print those out for each of the words to see what 's happening , you know , how these models are training up ,
Mm - hmm. Mm - hmm.
you know , the long ones versus the short ones. I d I did  quickly , I did the silence model and   and um that 's coming out with about one point two seconds as its average duration and the silence model 's the one that 's used at the beginning and the end of each of the  string of digits.