Conversion de l'heure de Gogrial à l'heure de Campana
22:27:30
-5
17:27:30
+7
+7
+7
+7
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+6
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+1
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-1
-1
-1
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-2
-5
-5
-5
-6
-6
-6
-7
-7
-8
-9