Hello dear Monks!
I have a file in the form of:

nick 5
nick 10
george 2
peter 3
george 14
nick 20
[download]

and I want to output:

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

I had an old script that used to work:

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";
}
[download]

Now it produces weird results, can you please help me fix it? Perhaps I introduced a bug at some point and now I can't get it to work.
Current output (weird):

~~14ge:2
~~20:5
peter:3
[download]

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