Create output from Perl hash

[gbwien]

Hi Monks, I have an input file which I am parsing through using a hash to extract values. I've been out of perl for a bit, the following is an example of the input file, maybe you can help?

<BEGINFILE>
<SUBBEGIN    
    IMSI=23341400010332;
    MSISDN=411206901000;
    CF=CFU-ALL-PROV-NONE-YES-NO-NONE-YES-65535-NO-NO-NO-NO-NO-NO-NO-NO
+-NO-NO;
<SUBEND

My perl code below:-

#!/usr/bin/perl 
use strict;
use warnings;
use Data::Dumper;

#define files 
my $HSSIN='D:\testproject\HSS-export.txt';
my $sep = ",";
my $key1 = 'MSISDN';
my $key2 = 'CF';
my $MSISDN;
my $CF;
#1. normalise test file 
open (INFILE, $HSSIN) or die "Cant open input file";    
open (OUTFILE,"> $ofile" ) or die "Cant open file"; 

while (my $myline=<INFILE>)
{
    next if $myline =~ /(<BEGINFILE>)/;   #skip first line
        chop($myline);
    $myline=~ s/(\t)(.*)/$2/g; #remove all tabs
    $myline =~ /(<SUBBEGIN)(.*)(<SUBEND)/g; #record start end pos
    my $line = $2;
    my %hash = split(/=/,$line);
    #print Dumper \%hash;
    
    if (exists($hash{$key1})) 
    {
           $MSISDN = $hash{$key1};
           #print "$MSISDN\n";
               
    }

   if (exists($hash{$key2})) 
    {
           $CF = $hash{$key2};
           $CF =~s /(CFU-ALL-PROV|CFB-ALL-PROV|CFNRY-ALL-PROV|CFNRC-AL
+L-PROV)-(NONE)(.*)?/$1\-1\/1\/1\/1\/0/;
           $CF =~s /(CFD-TS10-ACT-|CFU-TS10-ACT-|CFD-TS10-REG-)((91)(\
+d*)?)(.*)/$1$4/;
           #print "$CF\n";
               
    }

}
#print $MSISDN,$sep,$CF;    
close  INFILE;

I do not know how to get the output I need? $MSISDN,$CF

 411206901000,CFU-ALL-PROV-NONE-YES-NO-NONE-YES-65535-NO-NO-NO-NO-NO-NO-NO-NO-NO-NO

Thank you, Graham