1-8
: 1s+3s lead down the middle & back up & remain in middle as 2s+4s step in
  behind 1s+3s respectively on bar 8. 1 2 3 4
9-16
: 1s+2s also 3s+4s dance Allemande.  2 1 4 3
17-24
: All set. 1s+3s turn partner 3/4 RH to finish in line up/down the
  middle; 1s+3s dance 1/2 RSh reels of 4
25-26
: 3s+1s turn partner 3/4 RH to face up
27-32
: 3s lead up & cast round 2s to 2nd place **while** 1s lead up & cast
  round 4s to 4th place. All set.  2 3 4 1