Petrila時間からIdah時間への変換
20:26:53
-2
18:26:53
+7
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+6
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+5
+5
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+2
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-1
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-1
-1
-1
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-2
-2
-2
-2
-2
-2
-3
-6
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-6
-7
-7
-7
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-10