zc  znn=c=rs   mc     or  nz=xiv=a   zzai 

       sc  ci     zv  cs     vx  zn     ww   sv  

       mx  u=     rs  nn     nr  rw     in   uo  

       wu  acn=cnwx   v=     sx  =ns=rzvs    zo  

 me    or  ns          az   ss   x=          nr  

 ee    uz  vz           == xo    zi          ux  

  e==ouc   az            =si     nx         esiw