The beginning of a data frame is indicated by the special flag bytes: BEG The end of a data frame is indicated by the special flag bytes: FIN The special escape bytes ADV are used for escaping accidental occurrences of either the flag bytes or the escape bytes within the data. The following byte stream is data that needs to be framed by the link layer on the sender's side. Derive the byte stream by adding necessary flag bytes and performing byte stuffing: TODAYWEBEGINOURGREATESTADVENTURE