47 3
a
b a x
c b x
d c x
m l x
e d x
f e x
g f x
h g x
tt ss x
j i x
k j x
l k x
n m x
o n x
p o x
q p x
r q x
s r x
u t x
v u x
w v x
bb w x
cc bb x
dd cc x
ee dd x
ff ee x
gg ff x
hh gg x
jj ii x
kk jj x
i h x
ll kk x
mm ll x
nn mm x
oo nn x
pp oo x
qq pp x
t s x
rr qq x
ss rr x
uu tt x
vv uu x
ww vv x
aaa c vv
ii hh x
bbb c tt
ccc c ww
aaa
bbb
ccc
