1-8
: 1s+2s also 3s+4s pass RSh on sides, 2s and 3s cross RH **while** 1s+4s
  dance LSh round each other on sides, repeat to end 1 2 3 4 on opp
  sides
9-16
: Repeat from new positions to 1 2 3 4 own sides
17-24
: All set, 1s+2s also 3s+4s dance 1/2 RH across, all set and cross
  RH. 2143
25-32
: 1L and 3M followed by partners cast and dance 3/4 Fig of 8 round 4s
  (pass LSh between 4s) to end  2 3 4 1