#include <bits/stdc++.h>
using namespace std;
int main(void){
    const int n=50,k=100;
    int g;
    cin>>g>>g;
    vector<string>s(n);
    for(int i=0;i<n;i++){
        cin>>s[i];
    }
    vector<array<int,2>>tmp={{0,20},{1,19},{2,18},{3,17},{4,16},{5,15},{6,14},{7,13},{8,12},{9,11},{10,10},{10,39},{11,11},{11,38},{11,40},{12,12},{12,37},{12,41},{13,13},{13,36},{13,42},{14,14},{14,35},{14,43},{15,15},{15,34},{15,44},{16,16},{16,33},{16,45},{17,17},{17,32},{17,46},{18,18},{18,31},{18,47},{19,19},{19,30},{19,48},{20,20},{20,29},{20,49},{21,21},{21,28},{22,22},{22,27},{23,23},{23,26},{24,24},{24,25},{25,24},{25,25},{26,23},{26,26},{27,0},{27,22},{27,27},{28,1},{28,21},{28,28},{29,2},{29,20},{29,29},{30,3},{30,19},{30,30},{31,4},{31,18},{31,31},{32,5},{32,17},{32,32},{33,6},{33,16},{33,33},{34,7},{34,15},{34,34},{35,8},{35,14},{35,35},{36,9},{36,13},{36,36},{37,10},{37,12},{37,37},{38,11},{38,36},{39,35},{40,34},{41,33},{42,32},{43,31},{44,30},{45,29},{46,28},{47,27},{48,26},{49,25}};
    set<array<int,2>>ans;
    for(int i=0;i<100;i++){
        if(s[tmp[i][0]][tmp[i][1]]!='0')ans.insert({tmp[i][0],tmp[i][1]});
    }
    cout<<ans.size()<<endl;
    for(auto x:ans){
        cout<<x[0]<<" "<<x[1]<<endl;
    }
    return 0;
}