IIIIIIIIII  '      mmmmmmm    

     I          '    m     m       m

     I            '  m     m       m

IIIIIIIIII         m     m       m



                           t

nnnnn    oooo  ttttttt

n      n    o    o     t

n      n    oooo     ttttt



aaaaa

        a 

        a

aaaaa     nnnnn

a      a     n      n  

a      a     n      n

aaaaa     n      n





                d

                d

                d

                d

     i          d      i

        ddddd                              t

     i  d      d      i    ooooo      tttttttt

     i  d      d      i    o      o         t 

     i  d      d      i    o      o         t

     i  ddddd      i    ooooo         tttttt