Konwersja czasu Masaki-chō do czasu Sevan
15:20:40
-5
10:20:40
+2
+2
+0
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-1
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-1
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-1
-1
-1
-1
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-1
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-1
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-1
-1
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-1
-1
-1
-1
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-12
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-12