#!/usr/bin/env perl
use strict;
use warnings;
use Data::Dump;

# An array of files
my @filesTxt = ('abc1','abc2');
my %hash;

$hash{$_} = [ glob("$_*") ] for @filesTxt;

dd %hash;

##</code><code>##

( 
  "abc2",
  ["abc2", "abc20" .. "abc29"],
  "abc1",
  ["abc1", "abc10" .. "abc19"],
)