time perl -MAlgorithm::Combinatorics=:all -wle'
my $i=variations_with_repetition(["a".."z"],$ARGV[0]); 
my @x; push @x, map {s/ //} qq[@$_] while $_=$i->next; 
print scalar @x' 4


##</code><code>##

time perl -MAlgorithm::Combinatorics=:all -wle'
my $i=variations_with_repetition(["a".."z"],$ARGV[0]); 
my @x; push @x, map {$_} qq[@$_] while $_=$i->next; 
print scalar @x' 4


##</code><code>##

time perl -MAlgorithm::Combinatorics=:all -wle'
my $i=variations_with_repetition(["a".."z"],$ARGV[0]); 
my @x; push @x, pack "A*", qq[@$_] while $_=$i->next; 
print scalar @x' 4


##</code><code>##

time perl -MAlgorithm::Combinatorics=:all -wle'
my $i=variations_with_repetition(["a".."z"],$ARGV[0]); 
my @x; push @x, join "", @$_ while $_=$i->next; 
print scalar @x' 4


##</code><code>##

time perl -MAlgorithm::Combinatorics=:all -le'
my $i=variations_with_repetition(["a".."z"],$ARGV[0]); 
my @x; qq[$"=undef]; push @x, qq[@$_] while $_=$i->next; 
print scalar @x' 4