this may not be right but it sounds pretty good
[ Tab from: https://www.guitartabs.cc/tabs/l/lynn_strait/sad_air_tab.html ]
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|-0-0-8-8-8-8-8/7-0-7-| |-0-0-8-8-8-8-8/10-0-10-|
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the rhythm is pretty easy but you have to listen to it.