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when I came back to you. But it's those gaps, those junctions in rails to allow for heat and colds. And otherwise they open up when it's cool and when they have to go slowly when we get very cold. Or because the gaps open up because they don't, they don't. And that means they slow down. And of course when they get close we have to slow down. And I hope that answered it there, Roger. Thank you very much for being in the net. And hopefully you've got your voice back and I can talk to you on Sunday. So I'll say seven threes to Roger K-0,