nick 5
nick 10
george 2
peter 3
george 14
nick 20

##</code><code>##

george:2,14
nick:5~~10~~20
peter:3

##</code><code>##

use strict;
use warnings;

my %res;
while (<>) 
{
	chomp;
    my ( $name, $rest ) = split /\t/;
    push @{ $res{$name} }, $rest;
}
for $a( sort keys %res ) 
{
    print "$a:". join( "~~", @{ $res{$a} } );
	print "\n";
}


##</code><code>##

~~14ge:2
~~20:5
peter:3