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  1. or download this
    my $input = 'foo+bar+baz';
    my $i = 1;
    my $string = join '&', map { 'keyword' . $i++ . '=' . $_ } split /\+/,
    + $input;
    
  2. or download this
    2;0 juerd@ouranos:~$ perl -e'undef christmas'
    Segmentation fault
    2;139 juerd@ouranos:~$