Conversion de l'heure de Bergkamen à l'heure de Campana
20:21:37
-5
15:21:37
+7
+7
+7
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+6
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+1
+1
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-1
-1
-1
-1
-1
-1
-2
-5
-5
-5
-6
-6
-6
-7
-7
-8
-9