La correction:
1
|
2
|
3
|
4
|
5
|
c
|
b
|
b
|
a
|
c
|
6
|
7
|
8
|
9
|
10
|
c
|
b
|
b
|
a
|
C
|
11
|
12
|
13
|
14
|
15
|
a,b
|
b,d
|
c
|
a
|
a
|
16
|
17
|
|
|
|
b
|
b
|
|
|
|
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