TYB
> >>19407191 (pb) Ann Arbor elementary school principal placed on leave in wake of WXYZ investigation
First anon has heard of "WXYZ"; it neatly resonates as "4D marker".
X, Y and Z are length, width, and height in these three dimensions.
Since we can't "go beyond Z" we then start to work backwards for the 4th and higher: W, V, U etc.
QR-topically: the tenth dimension would thus be labeled "Q"!
11-minute primer on the 10 dimensions:
https://www.youtube.com/watch?v=p4Gotl9vRGs