#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll=long long;
using ld=long double;
using st=string;
using P=pair<ll,ll>;
typedef atcoder::modint mint;
ll inf=9e18;
template<typename T, int s, int i = 0>
auto vec(const ll (&sizes)[s], const T& init = T()){
  if constexpr(i < s) return vector(sizes[i], vec<T, s, i+1>(sizes, init));
  else return init;
}


int main(){
  ll n,m,ans=0;
  cin>>n>>m;
  auto s=vec<st>({n},"");
  for(ll i=0;i<n;i++){
    cin>>s[i];
  }
  for(ll i=0;i<n;i++){
    bool f=0,g=1;
    for(ll j=0;j<m;j++){
      if(s[i][j]=='x') continue;
      f=1;
      for(ll k=0;k<n;k++){
        if(i==k) continue;
        if(s[k][j]=='o') g=0;
      }
    }
    if(f&&g) ans++;
  }
  cout<<ans<<"\n";
}