1-8
: 1M+2L also 3M+4L set, change places LH & dance round partners back to
  places
9-16
: 1L+2M also 3L+4M set, change places RH & dance round partners back to
  places
17-24
: 1s+2s also 3s+4s dance RH across, 2s+3s dance LH across
25-32
: 1s+2s also 3s+4s dance RH across, 1s dance down the middle to 4th place