Slantsy時間からPyongyang時間への変換
00:18:22
+6
06:18:22
+7
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+6
+6
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+5
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-1
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-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
-6
-6
-7
-7
-7
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-10