gistfile1.txt

var alphabet = "abcdefghijklmnopqrstuvwxyz";
);

var query = from a in alphabet
            from b in alphabet
            from c in alphabet
            select "" + a + b + c;

foreach (var item in query)
{
    Console.WriteLine(item);
}
// C#

all_3_letter_word_combos = [('a'..'z').to_a, 
                            ('aa'..'zz').to_a, 
                            ('aaa'..'zzz').to_a].flatten!
all_3_letter_words_combos.map { |w| puts w }