1-8
: 1s+2s+3s dance mirror reels of 3 (1s in/down, 2s out/up, 3s in/up)
9-16
: All set, 1s cross RH; 1s cast (2s step up), pass LSh to face 1st corners
17-20
: 1s+1st corners set, 1s pull back RSh & dance round each other to
  face 2nd corners **while** 1st corners continue to set
21-24
: 1s+2nd corners set, 1s pull back RSh & dance round each other to
  face 3rd corners **while** 2nd corners continue to set
25-32
: 1M+2s also 1L+3s dance LH across;1s pass LSh to dance RH across with
  other couple.  2 1 3