Sorry to disagree, as we usually agree on everything, but I had answers with all sorts of symbols and it got all of them right! That’s why it was freaky! I had z, r, 1, l, and o (I think) and it got them all!
Right. Don’t click on “Try Again”. Don’t click on anything. Just choose a number, do the calculation, check what symbol it corresponds to visually (without entering it on the page or clicking anything), then choose another number, do the calculation, and check what symbol that corresponds to – you’ll find that one symbol will correspond to any number you choose, provided the page is not reloaded.