exo3: add question 2 code.
authorJérôme Benoit <jerome.benoit@piment-noir.org>
Tue, 10 Apr 2018 10:16:49 +0000 (12:16 +0200)
committerJérôme Benoit <jerome.benoit@piment-noir.org>
Tue, 10 Apr 2018 10:16:49 +0000 (12:16 +0200)
Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

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