a a
a a
b b
b b
b b
b b
b b
b b
c b
c b
c b
c b
d d
d d
d d
e f
f f
f f
f f
f f
f g
g g
g g
h g
h h
h h
h h
h h
h h
h h
i i
i i
i i
i i
i i
i i
j j
j j
j j
j j
j j
j j
k k
l k
l l
l l
l l
l l
l l
