Congratulations to those students who found 6210001000 as the unique 10-digit number that satisfies the requirements. Winners include Joe F., Veronica B., Asha, Dublin, Clementine, Cy D., Savi R., Harvest, and Indigo D.M. of the 3rd grade, Hannah, Sam, Leo of the 4th grade, and Aury, Clara, Cole, Noah, Gabriel, and Marley of the 7th grade.