AA      AA      AA    AA      AA      AA
  BB      BB      BBBB      BB      BB
    CC      CC            CC      CC
      DD      DD        DD      DD
EE      EE      EE    EE      EE      EE
  FF      FF      FFFF      FF      FF
    GG      GG            GG      GG
      HH      HH        HH      HH
II      II      II    II      II      II
  JJ      JJ      JJJJ      JJ      JJ
    KK      KK            KK      KK
L     LL      LL        LL      LL     L
M     MM      MM        MM      MM     M
    NN      NN            NN      NN
  OO      OO      OOOO      OO      OO
PP      PP      PP    PP      PP      PP
      QQ      QQ        QQ      QQ
    RR      RR            RR      RR
  SS      SS      SSSS      SS      SS
TT      TT      TT    TT      TT      TT
      UU      UU        UU      UU
    VV      VV            VV      VV
  WW      WW      WWWW      WW      WW
XX      XX      XX    XX      XX      XX