$ cat cust
12:10 a  america
12:11 b  bombay
12:12 c  calcutta
12:13 a  australia
2:30   b  bhutan
3:40  n    neterland

##</code><code>##

#!/usr/bin/perl
open FILE1, "cust" or die;
my %hash;
my %location;
while (my $line=<FILE1>) {
   chomp($line);
   (my $word1,my $word2, my $word3) = split /\s+/, $line;
   push (@{$hash{$word2}},$word1);
   push (@{$location{$word2}},$word3);
}

for $user (sort keys %hash) {
    print "$user: @{$hash{$user}} \n";
}

for $loc (sort keys %location) {
    print "$loc: @{$location{$loc}} \n";
}

##</code><code>##

a: 12:10 12:13 
b: 12:11 2:30 
c: 12:12 
n: 3:40 
a: america australia 
b: bombay bhutan 
c: calcutta 
n: neterland 

##</code><code>##

a: 12:10 12:13 : america australia