OMG, thank you. I was afraid I had finally lost my mind for sure. I do remember the interlocking rings. The Moebius strip is just such fun. Math can be a lot of fun, if you understand it. I do not. LibArts major. Do you want fries with that?
Re teaching: to add to someone's understanding is a gift and a calling. To do it in other languages more so. As our French brethren say, "Chapeau!"
