a,g
a,l
f,k
c,g c,h
e,g e,h
a,j b,j c,j
34
a,i
a,j
a,k
a,l
b,g
b,h
b,i
b,j
b,k
b,l
c,g
c,h
c,i
c,j
c,k
c,l
d,g
d,h
d,i
d,j
d,k
d,l
e,g
e,h
e,i
e,j
e,k
e,l
f,g
f,h
f,i
f,j
f,k
f,l