use warnings;
use strict;
use List::Compare;

my @allwords = qw( mary had a little lamb its fleece was white as snow );
my @checkwords1 = qw( little lamb fleece everywhere );
my @checkwords2 = qw( little lamb fleece );

my $lc1 = List::Compare->new(\@allwords, \@checkwords1);
my $lc2 = List::Compare->new(\@allwords, \@checkwords2);

## See if the list on the Right, @checkwords, 
##    is a subset of the list on the left, @allwords.
print "Check 1: All words were ", $lc1->is_RsubsetL ? "" : "not ", "found.\n";
print "Check 2: All words were ", $lc2->is_RsubsetL ? "" : "not ", "found.\n";

__END__
Check 1: All words were not found.
Check 2: All words were found.