以下Perl程序的输出结果是下列哪个选项?
$txt="1234a56";
$txt =~ /\d\d/g;
print "$&,",pos $txt,",";
$txt =~ /\d\d/g;
print "$&,",pos $txt,",";
$txt =~ /\d\d\d/g;
print "$&,",pos $txt,",";
$txt =~ /\d/g;
print "$&,",pos $txt,"";
以下Perl程序的输出结果是下列哪个选项?
$txt="1234a56";
$txt =~ /\d\d/g;
print "$&,",pos $txt,",";
$txt =~ /\d\d/g;
print "$&,",pos $txt,",";
$txt =~ /\d\d\d/g;
print "$&,",pos $txt,",";
$txt =~ /\d/g;
print "$&,",pos $txt,"";
12,4,34,5,34,2,2,2
12,3,34,4,34,1,2,2
12,3,34,5,34,,1,1
12,2,34,4,34,,1,1
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