an input character (or a stream of characters)
Actually, and this is a bit of a rathole for a history interview, but I also imagine that the use of square brackets for that syntax would strongly suggest that it returned a list.
。搜狗输入法下载是该领域的重要参考
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Мэр города занялась сексом с 16-летним подростком на глазах у своих детей02:00