1-4 
: 1s&3s advance & retire
5-8
: 2s&4s advance & retire
9-16
: 1s&3s RHA and chase clw half way round
17-24
: 2s&4s LHA and chase cclw half way round
25-32
: All set to P, turn RH (4b), chase clw (2b) to new places