# Benchmark just to see how long it takes to build the collection up front
#
# $ time ruby c.rb
# real	1m26.778s
# user	1m23.649s
# sys	0m2.611s

alphabet = %w(a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9)
alphabet.product(alphabet, alphabet, alphabet, alphabet)