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a b 100000
b c 100000
c d 100000
d e 100000
e f 100000
f g 100000
g h 100000
h i 100000
i j 100000
j k 100000
k l 100000
l m 100000
m n 100000
n o 100000
o p 100000
p q 100000
q r 100000
r s 100000
s t 100000
t u 100000
u v 100000
v w 100000
w x 100000
x y 100000
y z 100000
e c 784
d a 882
c a 953
b b 932
d c 701
c f 24
a a 370
d a 732
c a 232
b c 336
d b 533
a b 747
d d 546
d d 309
b c 888