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  1. or download this
    /^ween\s*\{\s*(.*\;)\s*\}$/
  2. or download this
    /^ween\s*{\s*(.*;)\s*}$/
  3. or download this
    $cmd =~ /[.!+=[\]*<>$%@?&:\/\\{}]/g

# also possible but I prefer the alternative above
$cmd =~ /[].!+=[*<>$%@?&:\/\\{}]/g
  4. or download this
    $cmd =~ m#[.!+=[\]*<>$%@?&:/\\{}]#