using System;
using System.Collections.Generic;
using System.Linq;

namespace PasswordTableTest
{
    static class Program
    {
        static void Main(string[] args)
        {
            // Create a list of strings defining the charset for each index.
            var charsets = new List<string>
            { "abcdef", "defghi", "ghijkl", "jklmno", "mnopqrstuvwxyz", "pq234r", "st2342u" };

            // Get the IEnumerable (note: This does not generate the permutations, just gives an IEnumerable to enumerate through thema ll)
            var cp = CartesianProduct(charsets);

            // Print them out
            string row = "";
            foreach (string s in cp.Select(set => set.Aggregate("", (a, b) => a + b)))
            {
                row += s + ' ';
                if (row.Length > 60)
                {
                    Console.WriteLine(row);
                    row = "";
                }
            }
            Console.ReadKey();
        }
        public static IEnumerable<IEnumerable<T>> CartesianProduct<T>(this IEnumerable<IEnumerable<T>> sequences)
        {
            IEnumerable<IEnumerable<T>> result = new[] { Enumerable.Empty<T>() };
            return sequences.Aggregate(result, (current, s) =>
            (from seq in current from item in s select seq.Concat(new[] {item})));
        }
    }
}