Iten時間からMexico City時間への変換
07:27:06
-9
22:27:06
+7
+7
+6
+6
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+5
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+2
+2
+1.5
+1
+0.5
+0
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
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-6
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-10