 okay hold on we got a backup on this equipment train here okay okay and the reason is we have a lot of folks who listen and don't have a familiarity with equipment like some of us would okay so you mentioned you explained what the trapper is yeah but then you said the sieves yes okay and i i know you've got to do some adjustments on a combine when you're operating it for different crop etc let's talk about what the sieves are kevin if we could