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    #!/usr/bin/perl

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print "$n\n";  # 10
foo();
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    #!/usr/bin/perl

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print "$n\n";  # 10
foo();
print "$n\n";  # 11
  3. or download this
    #!/usr/bin/perl

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print "$n\n";  # 10
foo();
print "$n\n";  # 11
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    #!/usr/bin/perl

...
print "$n\n";  # 10
foo();
print "$n\n";  # 10
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    #!/usr/bin/perl

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print "$n\n";
foo();
print "$n\n";
  6. or download this
    #!/usr/bin/perl

...
print "$n\n";  # 10
foo();
print "$n\n";  # 11