and XT plus K which is not a neighboring variable with all the evidence you can imagine that the relief definitely again messages coming from left and right but you'll have to a little bit of thinking about what you do with the stuff in the middle you still have to sum over those variables in a way but not lose XT as you work your way to XT plus K ik is then you don't recover the joint you need to keep somehow XT around so you'll essentially do something like we did right on something out over XT you just keep it around and you skip the summing