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.
Wow. Lots of silence.
Yeah , yeah. And so the S P model , which is what they put in between digits , I  I haven't calculated that for that one yet , but um. So they basically  their   their model for a whole digit string is silence  digit , SP , digit , SP blah - blah - blah and then silence at the end. And so.
Are the SP 's optional ? I mean skip them ?