$_ =~ /(\d*).*SWITCH\sFastEthernet(\d)/;     # just an example on how to extract some data
my $id = $1;       						  # get the iD
my $switchNr = $2; 						  # get the number of the switch

##</code><code>##

$CUST_NAME{$id} .= "\nSWITCH Fa$switchNr ..."; # append the output, already formatted