Mm - hmm.
Mm - hmm.
Yeah.
Well it might be neat to do some , phonetic , features on these , nonword words. Are  are these kinds of words that people never  the " huh "s and the " hmm "s and the " huh "  and the uh  These k No , I 'm serious. There are all these kinds of  functional , uh , elements. I don't know what you call  them. But not just fill pauses but all kinds of ways of  interrupting  and so forth.