#include <bits/stdc++.h>

using namespace std;

int main(){
    int H, W;
    cin >> H >> W;
    char A[H][W];
    for (int i=0; i<H; ++i){
        for (int j=0; j<W; ++j){
            cin >> A[i][j];
        }
    }
    int n=H+W-2;
    int ans=0;
    for (int bit = 0;bit < (1<<n); ++bit){
        int here[2] = {0, 0};
        int num=1;
        for (int i=0; i<n; ++i){

            if (bit & (1<<i)){
                here[1] += 1;
            }else{
                here[0] += 1;
            }

            if (A[here[0]][here[1]]=='o'){
                num++;
            }else if(A[here[0]][here[1]]=='x'){
                num--;
                if (num<0){
                    break;
                }
            }else{num=-1;break;}

            if ((here[0]>=H) or (here[1]>=W)){num=-1;break;}
        }
        if (num>=0){ans++;}

    }
    cout << ans;
}