1-8
: 1s set & cast to 2nd place, 1s dance down between 3s & cast up to 2nd
  places
9-16
: 1s dance RH across with 2s, 1s dance LH across with 3s
17-24
: 1s lead down middle & lead back to 2nd places
25-32
: 2s+1s dance R&L