chemical engineering it was the paper industry and my job was to optimize air and drying systems for drying cardboard right we used cardboard you know they make it wet it's got to be dried and it was I can't say I really enjoyed it you'd have to go and so you know but you can see this is a person you'd have to go and stand up here and you'd have this long temperature measurement that you'd stick in there and measure the temperature of these dryer cans then you do the same thing with a humidity and you would do it on every single one of