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Window 0x800022:
  Machine:  genus
  Name:  xterm
...
  Icon Name:  mozilla-bin
  Command:  mozilla-bin
  Instance/Class:  mozilla-bin/Mozilla-bin

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open my $fd, 'xlsclients -la|' or die "open: $!";
WHILE: while (1) {
  my @para;
...
  print "@para\n";   ## quotes intended in this small example
}
close $fd;