.dGGGGGG    GGGGGGGGb  dP   dP   dP   GGGGGGba  
 dG'    GG    GG         GG   GG   GG   GG    `Gb 
 GGaaaaaGGa  aGGaaaa     GG  .GP  .GP  aGGaaaaGP' 
 GG     GG    GG         GG  dG'  dG'   GG        
 GG     GG    GG         GG.dGPG.dGP    GG        
 GG     GG    GGGGGGGGP  GGGG' YGG'     dP