#include <bits/stdc++.h>
using namespace std;
int main(void){
    int h,w;
    cin>>h>>w;
    vector<string> s(h);
    for(int i=0;i<h;i++){
        cin>>s[i];
    }
    vector<array<int,2>>ans;
    for(int i=0;i<h;i++){
        for(int j=0;j<w;j++){
            if(s[i][j]=='.'){
                if((i==0||s[i-1][j]=='#')&&(i!=h-1&&s[i+1][j]=='.')){
                    ans.push_back({i+1,j+1});
                }else if((j==0||s[i][j-1]=='#')&&(j!=w-1&&s[i][j+1]=='.')){
                    ans.push_back({i+1,j+1});
                }
            }
        }
    }
    cout<<ans.size()<<endl;
    for(auto x:ans){
        cout<<x[0]<<" "<<x[1]<<endl;
    }
    return 0;
}