25
a b 1.3
a c 1.6
a d 1.2
b e 1.5
c f 1.7
f c 1.7 35
d g 1.3
e f 1.6
e h 1.2
e i 1.5
f g 1.1
g j 1.7
h k 1.2
h i 1.5
i j 1.3
j i 1.3 30
i l 1.9
j k 1.6 50
j m 1.4 20
k n 2.2 30
l n 1.8
m n 1.2

a d 10
c f 0
j k 4
a
n