S - T - U - P- I- DMost likely a typo.
Sometimes your fingers just move at the wrong step, so instead of it being W -> V -> M, it comes out at V -> W -> M.
It happens sometimes. 3x in a row is unlikely, but still possible. I swear there's this one word I can't remember at the moment, but I can never seem to spell it properly the first time around.
You're welcome