This is just the intro. I'm not sure if it's completely right, but it sounds good to me.
[ Tab from: http://www.guitaretab.com/c/catch-22/83053.html ]
-5-7-7-5---5-7-5-7---5-7-7-5---5-7-5-5----------|
-5-9-7-7---5-9-7-9---5-9-7-7---5-9-7-5----------|
-6-9-8-7---6-9-7-9---6-9-8-7---6-9-7-6----------|
-7---9-----7---------7---9-----7-----7----------|
------------------------------------------------|
------------------------------------------------|
I think you strum each chord around 2 times or so.
