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I had Hit The Road Jack in my play list and I had been doing it a long time. Then one day one of my band mates came in and wanted to play Stray Cat Strut. It took once through to realize we knew most of the song already. Much of it was the same chord progression as Hit The Road Jack. Lots of songs share chord progressions, melody lines, and riffs. I don't know where the line is drawn. I'm not a song writer. But I am a singer and I come across a lot of songs that share.