day6, part2

            string[] lines = File.ReadAllLines("C:/input.txt");

            Dictionary<char, int>[] dicts = new Dictionary<char, int>[lines[0].Length];

            for(int i = 0; i < lines[0].Length; i++)
            {
                dicts[i] = new Dictionary<char, int>();
                for (int j = 0; j < lines.Length; j++)
                {
                    if(!dicts[i].ContainsKey(lines[j][i]))
                    {
                        dicts[i].Add(lines[j][i], 1);
                    }
                    else
                    {
                        dicts[i][lines[j][i]]++;
                    }
                }
                var c = dicts[i].OrderBy(r => r.Value).Select(r => r.Key).Take(1);
                Console.WriteLine(c.ToArray()[0]);
            }