import java.io.*;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Main {

    static class Task {

        private static final int MOD = (int) (1e9 + 7);

        private Long[][] memo;
        private int m;
        private int n;
        private char[][] grid;

        private long dfs(int row, int col) {
            if (row < 0 || row >= m || col < 0 || col >= n || grid[row][col] == '#') {
                return 0;
            }

            if (memo[row][col] != null) {
                return memo[row][col];
            }

            if (row == m - 1 && col == n - 1) {
                return 1;
            }

            memo[row][col] = (dfs(row, col + 1) + dfs(row + 1, col)) % MOD;
            return memo[row][col];
        }

        public void solve(int testNumber, InputReader in, PrintWriter out) {
            m = in.nextInt();
            n = in.nextInt();
            grid = new char[m][n];
            for (int i = 0; i < m; i++) {
                grid[i] = in.next().toCharArray();
            }

            memo = new Long[m][n];
            int ans = (int) (dfs(0, 0) % MOD);
            out.println(ans);
        }
    }

    private static void sort(double[] arr) {
        Double[] objArr = Arrays.stream(arr).boxed().toArray(Double[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void sort(int[] arr) {
        Integer[] objArr = Arrays.stream(arr).boxed().toArray(Integer[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void sort(long[] arr) {
        Long[] objArr = Arrays.stream(arr).boxed().toArray(Long[]::new);
        Arrays.sort(objArr);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = objArr[i];
        }
    }

    private static void solve() {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task task = new Task();
        task.solve(1, in, out);
        out.close();
    }

    public static void main(String[] args) {
        new Thread(null, () -> solve(), "1", 1 << 26).start();
    }

    static class InputReader {

        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }

    }

}


Measured memory_bytes: 81304