#!/usr/bin/env perl -l

use strict;
use warnings;

my @ValidLocations = ('Lynnwood','Edmonds');
my $ref = {
    'US/Seattle/WA' => ['Smith','Eric','Sam'],
    'US/WA/Lynnwood' => ['John','Chuck','Ram','Lynda'],
    'US/WA/Everette' => ['Sun','Rick','Raj'],
    'US/Edmonds/WA' => ['Ken','Josh','Matt'],
    'IN/Banglore/KA' => ['Anil','Dada','Kaka']
};

my $re = '^US.+?(?:' . join('|' => @ValidLocations) . ')';
my @valid_us_people = map { @{$ref->{$_}} } grep { /$re/ } keys %$ref;
print "@valid_us_people";

##</code><code>##

John Chuck Ram Lynda Ken Josh Matt