Cairo時間からBerwick時間への変換
21:11:01
+9
06:11:01
+7
+7
+7
+7
+7
+6
+6
+6
+6
+6
+6
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+2
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+1
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-1
-1
-1
-1
-1
-1
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-2
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-5
-5
-5
-5
-6
-7
-7
-7
-8
-10