If I'm not mistaken, you can in fact get the same digit three times in the ostrich head.

EDIT: I misread the article — it said you can't place the same digit more than three times.

Such a deep dive on ontological remodeling that I found myself starved for oxygen about the time palindromic lines came up.

Phistomofel’s Theorem though blew my mind. I'm still trying to convince myself it is legit. (Probably where I started to think about heading back to the surface.)