#include "bits/stdc++.h"

/*
#include "boost/multiprecision/cpp_int.hpp"
namespace mp = boost::multiprecision;
using i128=mp::cpp_int;
*/

using namespace std;
typedef long long ll;
typedef int64_t i64;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef vector<vvll> vvvll;
typedef vector<string> vs;
typedef vector<char> vc;
typedef vector<vc> vvc;
typedef vector<double> vd;
typedef vector<vd> vvd;
#define rep(i,a,n) for(int i=a;i<n;i++)
#define drep(i,a,n) for(int i=a;i>n;i--)
#define yes(ans) if(ans)cout<<"yes"<<endl;else cout<<"no"<<endl;
#define Yes(ans) if(ans)cout<<"Yes"<<endl;else cout<<"No"<<endl;
#define YES(ans) if(ans)cout<<"YES"<<endl;else cout<<"NO"<<endl;
#define iINF 1000000007
#define lINF 10000000000007
#define llINF 4000000000000000007
#define all(x) x.begin(),x.end()
#define so(x) sort(all(x))
#define re(x) reverse(all(x))
const double PI = acos(-1);
int main(){
    int h,w; cin>>h>>w;
    vs d(h); rep(i,0,h) cin>>d[i];
    vi now(h+w-2,1);
    rep(i,0,h-1) now[i]=0;
    
    int ans=0;
    do{
        int x=0,y=0;
        int cnt=1;
        bool wh=1;
        rep(i,0,h+w-2){
            if(now[i]==0) x++;
            else y++;
            if(d[x][y]=='#') wh=0;
            else if(d[x][y]=='o'){
                cnt++;
            }
            else{
                cnt--;
                if(cnt<0) wh=0;
            }
        }
        if(wh) ans++;
    }while(next_permutation(all(now)));
    cout<<ans<<endl;
}