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no event type or button # or keysym at /usr/lib64/perl5/vendor_perl/5.
+8.8/x86_64-linux-thread-multi/Tk/Widget.pm line 1105.
 at ./ThreadFeed.pl line 16

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#!/usr/bin/perl

...
    my $name = $ent -> get();
    $txt -> insert('end',"Hello, $name.");
}