#!/usr/bin/perl

use warnings;
use strict;

while (<DATA>) {
    chomp;
    my ($ezb, $numbers) = split(';',$_);
    my( $pre, $in, $post )= $numbers =~ /^(\d+(?=\()|[\d+, ]+?)(\d*\(.*\))(.*)/;
    print "$_:\n  \$pre  = '$pre\n  \$in   = '$in'\n  \$post = '$post'\n";
}
__DATA__
201.1;201(27, 28, 3, 4, 83, 84, 890, 897, 898, 9), 2054
201.2;201(1, 20-26, 29, 80-82, 891-896, 899)
201.3;201(52-54, 6, 75, 76, 85-88)
201.4;201(50, 51, 55-59, 70-74, 77-79)
2302.1;2302, 2304(3-8, 92-99), 2305(2, 4-9)
231.1;2301, 2303, 2304(1, 2, 90, 91), 2305(1, 3), 2306, 2307, 2308