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  1. or download this
          "foo" =~ m/(oo)/;
      {
        "bar" =~ /(ar)/;
      }
      print $1, "\n";
  2. or download this
    $search_string = "123abc";

...

foo(1);
  3. or download this
    123 abc
456 def
123 abc
  4. or download this
    123 abc
456 def
456 def
  5. or download this
       "foo" =~ /(oo)/;
   print $1;
  6. or download this
          "foo" =~ m/(oo)/;
      {
        "bar" =~ /(ar)/;
      }
      print $1, "\n";
  7. or download this
    $search_string = "123abc";

...

foo(1);