AAAA                     A
                             A                    AA
                            A                    A A
                            A  XXXXXX XXXXXXXX  A  A
                           A        X X         AAAAA
                           A        X X            A
                                    X X
                                NNNNXNXNNN
                          NNNNNN    X X   NNNNNN
                        NN          X X         NN
                     NNN        NNNNXNXNNN        NNN
                   NN      NNNNN    X X   NNNNN      NN
                  N      NN         X X        NN      N
                 N    NNN   RRRRR   X X  RRRRR   NNN    N
  AA            N    N    RRRRRRR   X X  RRRRRRR    N    N            AA
 A  A          N    N   RRRRRRRRRRRRXRXRRRRRRRRRRR   N    N          A  A
  AA          N    N   RRRR    RRRRRXRXRRRR    RRRR   N    N         A
 A  A        N    N   RRRR      RRR X XRRR      RRRR   N    N        AAA
 A  A  XXXXXXXXXXXXXXXXXXXXXXX  RR  X X RR   XXXXXXXXXXXXXXXXXXXXXX  A  A
  AA        N    N   RRRRRR    RRR    X RRR    RRRRRR   N    N        AA
           N     N   RRRRRRRRRRRRRR   XRRRRRRRRRRRRRR   N     N
 AAAA      N    N   RRRRRRRRRRRRRRRRRRXRRRRRRRRRRRRRRR   N    N      AAAA
 A         N    N   RRRR    RRRRRRRRRRXRRRRRRR    RRRR   N    N      A  A
 AAAA      N    N   RRR      RRRRRR   XRRRRRR      RRR   N    N        A
    A  XXXXXXXXXXXXXXXXXXXX  RRRRR    X RRRRR   XXXXXXXXXXXXXXXXXXX     A
 A  A      N    N   RRRR    RRRRRR    X RRRRRR    RRRR   N    N      A  A
  AA       N    N   RRRRRRRRRRRRRRR    RRRRRRRRRRRRRRR   N    N       AA
           N     N  RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR  N     N
  AA        N    N   RRRRRR    RRRRRRRRRRRR    RRRRRR   N    N         A
 A  A       N    N    RRRR      RRRRRRRRRR      RRRR    N    N        AA
    A  XXXXXXXXXXXXXXXXXXXXXXX  RRRRRRRRRR   XXXXXXXXXXXXXXXXXXXXXX  A A
  AAA         N    N    RRR    RRRRRRRRRRRR    RRR    N    N           A
 A             N    N    RRRRRRRRRRRRRRRRRRRRRRRR    N    N            A
 AAAA           N    N     RRRRRRRRRRRRRRRRRRRR     N    N             A
                 N    NNN        RRRRRRRR        NNN    N
                  N      NN      RRRRRRRR      NN      N
                   NN      NNNNN          NNNNN      NN
                     NNN        NNNNNNNNNN        NNN
                        NN                      NN
                          NNNNNN          NNNNNN
                                NNNNNNNNNN