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$x = '3333373367037336703733337003' ;$d=sub {chr unpack('N',pack ( ... dx( $d, $x) }; sub dx{ while ( $_[1]=~/(\d{6})(\d{1})/g){$out .= &{ $_[0]}($1 ,$2); }\$out;}
$x = '3333373' ;$d=sub {chr unpack('N',pack ( ... dx( $d, $x) }; sub dx{ while ( $_[1]=~/(\d{6})(\d{1})/g){$out .= &{ $_[0]}($1 ,$2); }\$out;}