Question $2(10$ points$)$

A byte$-$oriented link$-$layer protocol uses byte stuffing to prevent the frame end marker from being detected accidentally during the rest of the frame. The stuff byte value is $123.$ The bytes below are a complete frame $($including start and end markers, each one bytte$),$ just before the stuff bytes are added. How many stuff bytes will be added to this frame?

$241231978624523910312425217314189122122402422441099447$

$123245$

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