Gries時間からBuenos Aires時間への変換
01:47:55
-5
20:47:55
+7
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+3.5
+3.5
+3
+3
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+2
+1.5
+1
+1
+1
+1
+1
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-1
-1
-1
-1
-1
-1
-2
-5
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-5
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-9