Riff 1  (Main Riff in verse and Solo)
       Triplet
G -----7--------7-----------------|
D ----------7---------------------|
A 5---5-----------5-------------3-|
E ------------------2---3-3-4-4---|
  1   2   3   4   1   2   3   4
Often the walking bass has notes omitted

Riff 2  (Bridge)
G -----5--------------------------|
D ----------5---------------------|
A 3---3---------3-3---------------|
E ------------------0---1---2-2-3-|
  1   2   3   4   1   2   3   4

Riff 3  (Break)
G --------------------------------|--------------------------------|
D --2---3---4---5-----------------|---3---4---5--------------------|
A --------------------------------|--------------------------------|
E --------------------------------|--------------------3-----------|
  1   2   3   4   1   2   3   4                        Hold this note

This break sounds strange because it's not what the horns are playing
(especially the second time through).