#!/usr/bin/perl

use strict;
use warnings;

my $bikelock;
my $zodials = 4;
my $constellations = 10;

$bikelock = combicracker( {}, $zodials );
print_psychle($bikelock);

sub combicracker {
 
 my $ref = shift;
 my $zodials = shift;

 $ref->{ $_ } = { } for 0 .. $constellations-1; 
 
 if( --$zodials ){
  for my $key ( keys %$ref ){
    combicracker( $ref->{ $key }, $zodials );
  }
 }

 $ref;

}


sub print_psychle{

   my $bref = shift;
   my $sn = shift || '0';

   unless( (keys %$bref)[0] ){

     $sn =~ s/\A0//;
     print "attempt: $sn\n" ;
     return;
   }

   foreach my $attempt_builder ( keys %$bref ){
     my $att_b2 =   $sn . $attempt_builder;
     print_psychle( $bref->{$attempt_builder} , $att_b2 );
   }

}