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  1. or download this
    open PIPE_ONE, 'echo -e "oranges"|' or die "Can't fork";
    open PIPE_TWO, 'echo -e "apples"|' or die "Can't fork (again?)";
    
    my $line_pipe_one = readline(*PIPE_ONE);
    
  2. or download this
    open PIPE_THREE, '| wc -l';
    print PIPE_THREE "Hello World\n";