{{explanation}}
4s & 5s & 6s start on opp sides

1-8
: 1s+2s+3s also 4s+5s+6s circle 6H round & back
9-16
: All dance 1/2 Grand Chain (1s & 6s cross to start) to end in reverse
  order 6 5 4 (3)(2)(1)
17-24
: 6s+5s also 4s+3s also 2s+1s set & dance RH across 1/2 way, end couples
  stand **while** 6s+3s also 4s+1s set & dance LH across 1/2 way
25-32
: Centre couples (1s+6s) set to each other on sides & change places RH,
  all set & cross RH.  5 3 1 (6)(4)(2)