use strict;
use warnings;
my %h;
while (<DATA>) {
chomp; @_ = split /, /, $_, 2;
push @{$h{lc($_[0])}}, $_[1];
}
for (sort keys %h) {
print "$_\n";
print " $_\n" for sort @{$h{$_}};
print "\n";
}
__DATA__
server_A, Perl, UK
server_A, Word, UK
server_A, Outlook, UK
server_A, Excel, UK
server_B, Reuters, NL
server_B, TradeXL, NL
server_B, Thompsons, NL
server_B, Bloomberg, NL
server_B, Tibco, NL
server_c, BasketLink, USA
server_c, Evolution, USA
server_c, Lotus, USA
server_c, TIB, USA
server_A, Python, UK
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