Tatvan時間からKolkata時間への変換
+6
+6
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+5
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+0.5
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+0
-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-3
-3
-6
-6
-6
-6
-7
-8
-8
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-9
-11