Doug's tune

On the Andy Griffith show, the Dillards play Doug's tune, and Doug Dillard does a little melodic run about two or three measures in. I can't find it in any of the tabs that I've found, including Doug's own book. I'm not advanced enough to pick it out by ear, so I'm wondering if anyone has tabs for that, or if someone can help me pick it out. Thank you very much.      youtube-Doug's tune/ Andy Griffith showImage may be NSFW.
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