#include <bits/stdc++.h>
using namespace std;
int main(){
    int H,W; cin>>H>>W;
    vector<string> S(H); for(int i=0;i<H;i++) cin>>S[i];
    int dx[]={1,-1,0,0}, dy[]={0,0,1, -1};
    bool ch=1;
    while(ch){
        ch=0;
        vector<pair<int,int>> T;
        for(int i=0;i<H;i++)
            for(int j=0;j<W;j++)
                if(S[i][j]=='.'){
                    int c=0;
                    for(int k=0;k<4;k++){
                        int ni=i+dx[k], nj=j+dy[k];
                        if(ni>=0&&ni<H&&nj>=0&&nj<W&&S[ni][nj]=='#') c++;
                    }
                    if(c==1) T.push_back({i,j});
                }
        if(!T.empty()) ch=1;
        for(auto [i,j]:T) S[i][j]='#';
    }
    int ans=0; for(auto &r:S) for(char c:r) ans+=c=='#';
    cout<<ans;
}

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10 10
..........
....#.....
#.......#.
......#...
.......#..
.....#....
..........
..........
..#...#...
.......#..