using System;

using System.IO;

​

public class Program

{

    public static void Main()

    {

        int treeCount = 0;

        long total = 1;

        treeCount = CountTrees(new StringReader(input), 1, 1);

        total *= treeCount;

        Console.WriteLine("{0} trees", treeCount);

        treeCount = CountTrees(new StringReader(input), 3, 1);

        total *= treeCount;

        Console.WriteLine("{0} trees", treeCount);

        treeCount = CountTrees(new StringReader(input), 5, 1);

        total *= treeCount;

        Console.WriteLine("{0} trees", treeCount);

        treeCount = CountTrees(new StringReader(input), 7, 1);

        total *= treeCount;

        Console.WriteLine("{0} trees", treeCount);

        treeCount = CountTrees(new StringReader(input), 1, 2);

        total *= treeCount;

        Console.WriteLine("{0} trees", treeCount);

        Console.WriteLine("{0} trees total", total);

    }

    private static int CountTrees(StringReader inputReader, int dx, int dy)

    {

        int hPos = 0;

        string currentLine;

        int treeCount = 0;

​

        while((currentLine = inputReader.ReadLine()) != null)

        {

            if(currentLine[hPos].Equals('#'))

                treeCount++;

            hPos = (hPos + dx) % currentLine.Length;

            if(dy > 1)

                inputReader.ReadLine();

        }

        return treeCount;

    }

​

    private static string input = @"..#..#......###.#...#......#..#

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}