Torcy時間からIbadan時間への変換
12:52:20
-1
11:52:20
+7
+7
+7
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+6
+6
+6
+6
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+3.5
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+3.5
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+3
+3
+2.5
+2
+1.5
+1
+1
+1
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+1
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+0
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-1
-1
-1
-1
-1
-1
-2
-5
-5
-5
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-9