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  1. or download this
    'aaaa+' =~ /(a+)/;     print "$1\n";
'aaaa+' =~ /(\Qa+\E)/; print "$1\n";
__END__
aaaa
a+
  2. or download this
    /^\Q*** END ***\E$/
  3. or download this
    /^\*\*\* END \*\*\*$/