The original idea is credited to milton freedmen who in the nineteen fifties. Ivy league created the first i s a cohort, but ther there was a flaw in how they did it. When we get back from this quick break, i want tounder and how yl actually figured out how not to do it as a group, but to do it as individuals. And then we'll get into what you're doing with meritos when we get back on this.