break it up available and then if something you have auxilary random data we'd like to transmit and we set it across we don't have to pay a profit and somebody asked carries that cost so you've actually did something with approximate inference in a VA II we don't find the exact kathiria for Z given X we have an inference network or here Q I give an X in first network we sample hum q are given X otherwise everything is saying we go through the whole process what happens is what we get back is log 1 over Q I given X and