use strict;

my $some_word = 'race';

my @letters = split //, $some_word;

my (@array1, @array2);

for (1..@letters) {
   my @new = @letters;
   push (@array1, \@new);
   push (@array2, \@letters);
   my $myshift = shift @letters;
   push(@letters, $myshift);
}

print "array1 contains:\n";

foreach my $aref (@array1) {
   print "@$aref\n";
}

print "\n\n";

print "array2 contains:\n";

foreach my $aref (@array2) {
   print "@$aref\n";
}

##</code><code>##

array1 contains:
r a c e
a c e r
c e r a
e r a c


array2 contains:
r a c e
r a c e
r a c e
r a c e