#!/usr/bin/perl -wT

$ENV{'PATH'} = "";
use strict;
my $word = defined($_=shift) ? $_ : die "usage: $0 <word>\n"; 
chomp($word);

($word) = $word =~ /^(\w+)$/ or die 'Bad User!';
my @chars = split //, $word;

my $speller ="spelled";

sub spelled {
	my $word = shift;
	my $out=`$speller $word`;
	chomp($out);
	if ( length($out) > 0 ) {
		print "[$out]\n";
	}
}



sub swap {
	my $i = shift;
	my $j = shift;
	my $A = shift; # ref to array
	my $tmp = @{$A}[$i];
	@{$A}[$i] =  @{$A}[$j];
	@{$A}[$j] =  $tmp;
}

sub permute {
	my $i = shift;
	my $n = shift;
	my $T = shift; #ref to array

	if ( $i == $n ) {
                my $word = join( "", @{$T} );
		spelled( $word );
	} else {
		for my $j ( $i..$n) {
			swap( $i-1, $j-1, $T );
			permute( $i+1, $n, $T );
			swap( $i-1, $j-1, $T );
		}
	}
}
permute (1,$#chars+1,\@chars);

##</code><code>##

$ cat spelled
#!/bin/sh
ASPELL=/usr/bin/aspell
GREP=/usr/bin/grep
EGREP=/usr/bin/egrep
for i in $*
do
        correct=`echo $i | $ASPELL -a | $GREP -v '^@' | $GREP -v '^&' | $EGREP  -v '^$'`
        if [ ! -z "$correct" ] 
        then
                echo "$i"
        fi
done

##</code><code>##

$ jumble.pl cat
[cat]
[act]