"ot_inc" (who is also a user on Twitter) has been ++'ed 3 times and --'ed 2 times by a total of 4 people.
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Operation Sign, User and Reason
++'ed by nkoz (それは知らなかった)
Tweet: ot_inc++ それは知らなかった
++'ed by nkoz (ようこそ)
Tweet: ot_inc++ ようこそ
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