public string A()
    {
      return Count(GetGrid(GetInput()));
    }

    public string B()
    {
      Print(GetGrid(GetInput()));
      return null;
    }

    public bool[,] GetGrid(string input)
    {
      var grid = new bool[6, 50];

      foreach (Match m in Regex.Matches(GetInput(), @"(?'cmd'rect|rotate column|rotate row) (x=|y=)?(?'a'\d+)( by |x)(?'b'\d+)"))
      {
        int a = int.Parse(m.Groups["a"].Value), b = int.Parse(m.Groups["b"].Value);

        switch (m.Groups["cmd"].Value)
        {
          case "rect":
            for (var x = 0; x < b; x++) for (var y = 0; y < a; y++) grid[x, y] = true;
            break;
          case "rotate column":
            for (var i = 0; i < b; i++)
            {
              var t = grid[grid.GetLength(0) - 1, a];
              for (var x = 0; x < grid.GetLength(0); Swap(ref grid[x++, a], ref t)) ;
            }
            break;
          case "rotate row":
            for (var i = 0; i < b; i++)
            {
              var t = grid[a, grid.GetLength(1) - 1];
              for (var y = 0; y < grid.GetLength(1); Swap(ref grid[a, y++], ref t)) ;
            }
            break;
        }
      }

      return grid;
    }

    public void Swap(ref bool a, ref bool b)
    {
      var c = a;
      a = b;
      b = c;
    }

    public string Count(bool[,] grid)
    {
      var i = 0;
      for (var x = 0; x < grid.GetLength(0); x++) for (var y = 0; y < grid.GetLength(1); y++) if (grid[x, y]) i++;

      return i.ToString();
    }

    public void Print(bool[,] grid)
    {
      for (var x = 0; x < grid.GetLength(0); x++)
      {
        for (var y = 0; y < grid.GetLength(1); y++) Console.Write(grid[x, y] ? "#" : ".");
        Console.WriteLine();
      }
    }