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  1. or download this
      DB<1> my $x = 1
    
    ...
    
      DB<4> p $x
    1
    
  2. or download this
      DB<5> p $main::x
    1
    
  3. or download this
      DB<1> 'a' =~ /(.)/
    
    ...
      DB<3> 'a' =~ /(.)/ && print $1
    a
      DB<4>
    
  4. or download this
      DB<5> 'a' =~ /(.)/ && $g = $1
      DB<6> print $g
    a
      DB<7>