#include <bits/stdc++.h>
using namespace std;

int main() {
  int H, W;
  cin >> H >> W;
  vector<string> A(H);
  for (int i=0; i < H; ++i)
    cin >> A[i];

  auto chk = [H, W](int i, int j) {
    return 0 <= i && i < H && 0 <= j && j < W;
  };
  auto dp = vector(H, vector(W, vector(H+W+1, 0LL)));
  dp[0][0][1] = 1;
  for (int i=0; i < H; ++i)
  for (int j=0; j < W; ++j)
  for (int k=0; k < H+W; ++k) {
    for (auto const &[i2, j2] : {pair(i, j+1), pair(i+1, j)})
      if (chk(i2, j2)) {
        if (A[i2][j2] == 'o')
          dp[i2][j2][k+1] += dp[i][j][k];
        if (A[i2][j2] == 'x' && k > 0)
          dp[i2][j2][k-1] += dp[i][j][k];
      }
  }

  long long answer{};
  for (int k=0; k < H+W; ++k)
    answer += dp[H-1][W-1][k];
  
  cout << answer << endl;
}