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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,M; cin >> N >> M;
    vector<int> C(M);
    vector<string> S(N);
    for(auto &s : S){
        cin >> s;
        for(int i=0; i<M; i++) C.at(i) += s.at(i)=='o';
    }
    int answer = 0;
    for(auto &s : S){
        int now = 1,now2 = 0;
        for(int i=0; i<M; i++) if(s.at(i) == 'o' && C.at(i) > 1) now = 0;
        for(int i=0; i<M; i++) if(s.at(i) == 'o') now2 = 1;
        answer += now&now2;
    }
    cout << answer << endl;
}