Sakakah時間からDiffa時間への変換
21:13:17
-2
19:13:17
+6
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+1
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+0
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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