ROT13 is common in puzzles: u → h , q → d , r → e , t → g , o → b → hdegb (not http ). ROT13 on whole: http uqrto fcsm → uggc hdgeb spfz — nonsense.
"http urgent to fcsm")Optical Character Recognition (OCR) software often misreads printed text. For example, “http://uq.edu.au/fcsm” (a plausible academic URL) could become http uqrto fcsm if the scan distorts “.edu” into “rto.” Similarly, speech recognition might misinterpret “http urgent FCSM” as “uqrto.” http uqrto fcsm