#!perlenv -w

use strict;

if($#ARGV <1) { 
print <<EOF;
usage: char-gen <charSetNum> <stringLength>
charSetNum 1 = 
a b c 

charSetNum 2 = 
a b c
1 2 3 

charSetNum 3 = 
a b c 
1 2 3
! @ #

EOF
die();
} 


my @charsSetOne = qw/ a b c /;
my @charsSetTwo = qw/ a b c 1 2 3 /;
my @charsSetThree = split // , q'abc123!@#';

my @chars;

if ( $ARGV[0] == 1) {
	@chars = @charsSetOne;
	}
elsif ( $ARGV[0] == 2) {
	@chars = @charsSetTwo;
	}
elsif ( $ARGV[0] == 3) {
	@chars = @charsSetThree;
	}


my @charsOne = @chars;
my @charsTwo = @chars;
my @charsThree = @chars;

my $charsOne;
my $charsTwo;
my $charsThree;


my @charSetNum = $ARGV[0];
my $stringLength = $ARGV[1];



if ( $stringLength >= 1) {

for $charsOne (@charsOne) {
	print $charsOne . "\n";
}
}



if ( $stringLength >= 2) {

foreach $charsOne (@charsOne) {
		foreach $charsTwo (@charsTwo) {
			print $charsOne;
			print $charsTwo . "\n";
		}			
}
}



if ($stringLength >= 3) {
foreach $charsOne (@charsOne) {
		foreach $charsTwo (@charsTwo) {
			foreach $charsThree (@charsThree) {
				print $charsOne;
				print $charsTwo;
				print $charsThree . "\n";
			}			
		}
}
}