Al just remember the key changes at the bridge to Gb(F#), and notice the progression of the chords at the turn-around at the end of the bridge to get back to the key of Eb.

Boy with an acoustic bass, drums and piano this stuff really swings when everyone can not only improvise but swing also.

Some folks know all the technological chord theory, (head knowledge) but they never learn to swing. Many of the jazz greats said either you got it or you don't, meaning swing.

Even if we can't swing it doesn't mean we should give up. The biggest room in the world is the "room for improvement" We can all do better!