#pragma warning disable

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Text.RegularExpressions;
using System.Diagnostics;
using System.Numerics;
using System.Collections;

static class MainClass
{
    public static void Main(string[] args)
    {
        var HW = Console.ReadLine().SplittedStringToInt32List();
        var H = HW[0];
        var W = HW[1];

        var grid = new bool?[H + 1,W + 1];
        for (int i = 0; i < H; i++)
        {
            var count = 0;
            Console.ReadLine().ToList().ForEach(x => grid[i, count++] = x == '#');
        }
        var ansgrid = new long[H + 1, W + 1];
        for (int i = 0; i < H+1; i++)
        {
            for (int j = 0; j < W+1; j++)
            {
                ansgrid[i, j] = 0;
            }
        }
        ansgrid[0, 0] = 1;
        var dx = new int[] { 1, 0 };
        var dy = new int[] { 0, 1 };
        var queue = new Queue<KeyValuePair<int, int>>();
        queue.Enqueue(new KeyValuePair<int, int>(0, 0));
        while (queue.Count != 0)
        {
            var item = queue.Dequeue();
            var num = 0l;
            if (item.Key - 1 >= 0)
                num += ansgrid[item.Key - 1, item.Value];
            if (item.Value - 1 >= 0)
                num += ansgrid[item.Key, item.Value - 1];
            if (item.Key == item.Value && item.Key == 0)
                num = 1;
            ansgrid[item.Key, item.Value] = num % 1000000007;
            for (int i = 0; i < 2; i++)
            {
                var x = item.Key + dx[i];
                var y = item.Value + dy[i];
                if (x < 0 || y < 0 || x >= H || y >= W)
                    continue;
                if (grid[x, y] == false)
                {
                    if (ansgrid[x,y] == 0)
                    {
                        queue.Enqueue(new KeyValuePair<int, int>(x, y));
                        grid[x, y] = null;
                    }
                }
            }
            if (ansgrid[H - 1, W - 1] != 0)
                break;
        }
        Console.WriteLine(ansgrid[H-1,W-1]);

        Console.ReadLine();
    }

    public static void PrintArray(int[,] array)
    {
        for (int i = 0; i < array.GetLength(0); i++)
        {
            for (int j = 0; j < array.GetLength(1); j++)
            {
                Console.Write(array[i, j] + " ");
            }
            Console.WriteLine();
        }
    }

    #region ライブラリ
    public static long ToInt64(this string str) => long.Parse(str);
    public static int ToInt32(this string str) => int.Parse(str);
    public static BigInteger ToBigInteger(this string str) => BigInteger.Parse(str);
    public static List<string> SplittedStringToList(this string str) => str.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).ToList();
    public static List<int> SplittedStringToInt32List(this string str) => str.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Select(x => int.Parse(x)).ToList();
    public static List<BigInteger> SplittedStringToBigInteger(this string str) => str.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Select(x => BigInteger.Parse(x)).ToList();
    public const int INF = int.MaxValue / 2;
    public const long LONGINF = long.MaxValue / 2;
    #endregion
}



Measured memory_bytes: 25048