Soweto時間からIbi時間への変換
13:28:27
-1
12:28:27
+7
+7
+7
+7
+7
+6
+6
+6
+6
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+1
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-1
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-1
-1
-1
-1
-2
-2
-2
-5
-5
-5
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-6
-7
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-10