c      b     a      e      f      d     
    trzd   vkekn  vkekn ykd    ykd    apdh   ykd   
  * apdh   wob    rua   atsv   euew   ykd    apdh  
    psnoq  atsv   psnoq ecz    rua    clj    gex   
  * ykd    clj    ykd   psnoq  pry    euew   wob   
  * ecz    gex    gex   pry    pry    clj    ykd   
    atsv   gex    psnoq trzd   zxgktr rua    rua   
    pry    trzd   clj   wob    atsv   gex    ecz   
  * zxgktr pry    atsv  wob    ecz    ecz    wob   
    clj    pry    vkekn ykd    apdh   trzd   trzd  
  * rua    gex    ykd   psnoq  vkekn  wob    atsv  
    juzex  apdh   euew  apdh   rua    zxgktr gex   
  * euew   trzd   juzex zxgktr rua    apdh   juzex 
→   gex    juzex  apdh  apdh   clj    apdh   wob   
  * vkekn  zxgktr euew  gex    apdh   apdh   trzd  
  * wob    gex    juzex trzd   vkekn  wob    vkekn