telnet to usenet

[Crazy]

I used telnet to connect to a newsgroup
And I tried to post a new message
So, I type the "POST" command
It said "340 Ok", then waiting for my key in
How can I do now?

telnet some.usenet
Trying some.usenet...
Connected to some.usenet.
Escape character is '^]'.
200 some.usenet InterNetNews NNRP server INN 2.2.2 13-Dec-1999
ready (posting ok).
group computer
211 778 1 786 computer
post
340 Ok
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Sorry for my bad English