2.2. Getopt::Long

    # This is a flag that specifies whether to present the moves in Run-Length
    # Encoding.
    my $to_rle = 1;
    my $output_states = 0;
    my $scan = "brfs";
    my $run_time_states_display = 0;

    #my $p = Getopt::Long::Parser->new();
    if (! GetOptions('rle!' => \$to_rle,
        'output-states!' => \$output_states,
        'method=s' => \$scan,
        'rtd!' => \$run_time_states_display,
        ))
    {
        die "Incorrect options passed!\n"
    }