import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.InputMismatchException;
import java.io.IOException;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Shivam
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        HGrid1 solver = new HGrid1();
        solver.solve(1, in, out);
        out.close();
    }

    static class HGrid1 {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int h = in.nextInt();
            int w = in.nextInt();
            int M = (int) 1e9 + 7;
            char c[][] = new char[h + 1][w + 1];
            for (int i = 1; i <= h; i++) {
                char s[] = in.nextString().toCharArray();
                for (int j = 1; j <= w; j++)
                    c[i][j] = s[j - 1];
            }
            int dp[][] = new int[h + 1][w + 1];
            dp[1][1] = 1;
            for (int i = 2; i <= w; i++)
                if (c[1][i] != '#')
                    dp[1][i] = dp[1][i - 1];
            for (int i = 2; i <= h; i++)
                if (c[i][1] != '#')
                    dp[i][1] = dp[i - 1][1];
            for (int i = 2; i <= h; i++)
                for (int j = 2; j <= w; j++)
                    if (c[i][j] != '#')
                        dp[i][j] = (dp[i - 1][j] % M + dp[i][j - 1] % M) % M;
            out.println(dp[h][w]);
        }

    }

    static class InputReader {
        private InputStream stream;
        private byte[] buf = new byte[8192];
        private int curChar;
        private int numChars;
        private InputReader.SpaceCharFilter filter;

        public InputReader(InputStream stream) {
            this.stream = stream;
        }

        public int read() {
            if (numChars == -1) {
                throw new InputMismatchException();
            }
            if (curChar >= numChars) {
                curChar = 0;
                try {
                    numChars = stream.read(buf);
                } catch (IOException e) {
                    throw new InputMismatchException();
                }
                if (numChars <= 0) {
                    return -1;
                }
            }
            return buf[curChar++];
        }

        public int nextInt() {
            int c = read();
            while (isSpaceChar(c)) {
                c = read();
            }
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            int res = 0;
            do {
                if (c < '0' || c > '9') {
                    throw new InputMismatchException();
                }
                res *= 10;
                res += c - '0';
                c = read();
            } while (!isSpaceChar(c));
            return res * sgn;
        }

        public String nextString() {
            int c = read();
            while (isSpaceChar(c)) {
                c = read();
            }
            StringBuilder res = new StringBuilder();
            do {
                res.appendCodePoint(c);
                c = read();
            } while (!isSpaceChar(c));
            return res.toString();
        }

        public boolean isSpaceChar(int c) {
            if (filter != null) {
                return filter.isSpaceChar(c);
            }
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }

        public interface SpaceCharFilter {
            public boolean isSpaceChar(int ch);

        }

    }
}



Measured memory_bytes: 39984