NNN
                                                         N
    SSSSSSSSS BBBBBBBBB E       E     SSSSSSSSS NNNNNNNNNNNNNNNNNNNN
    S    S    B    B  B E       E     S    S    N      N    N      N
    S    S    B    BBBB E       E     S    S    N      N    N      N
 AAASAAAASAA  B         E       E  AAASAAASSAA  NNNNN  NNNNNN  NNNNN
A        S    B         E       E A        S    N   N          N   N
A        S    B    BBBB E       E A        S    N   N          N   N
A        A    B    B  B E       E A        A    N   N          N   N
 AAAAAAAAA    BBBBBBBBB EEEEEEEEE AAAAAAAAAA    NNNNN          NNNNN