Maardu時間からPreston時間への変換
00:14:16
+8
08:14:16
+6
+6
+6
+6
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+5
+5
+5
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+1
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
-6
-6
-6
-7
-7
-8
-8
-9
-10