GGGGGGGGb  dP     dP    .GGGGG.   dP    dP 
  GG         GG     GG   dG'   `GG  YG.  .GP 
 aGGaaaa     GGaaaaaGGa  GG          YGaaGP  
  GG         GG     GG   GG   YPGG  dG'  `Gb 
  GG         GG     GG   YG.   .GG  GG    GG 
  GGGGGGGGP  dP     dP    `GGGGG'   dP    dP