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

int main(){
	int m,n;
	cin>>m>>n;
	vector<vector<int>> v(m+2,vector<int>(n+2,0));
	for(int i=1;i<=m;i++){
		for(int j=1;j<=n;j++){
			cin>>v[i][j];
		}
	}
	int k;
	cin>>k;
	for(int i=0;i<k;i++){
		int x1,y1,x2,y2;
		cin>>x1>>y1>>x2>>y2;
		swap(v[x1][y1],v[x2][y2]);
	}
	int x=0;
	vector<pair<int,int>> result;
	for(int i=1;i<=m;i++){
		for(int j=1;j<=n;j++){
			int current=v[i][j];
			if(current>v[i-1][j]&&
               current>v[i][j-1]&&
               current>v[i][j+1]&&
               current>v[i+1][j]){
				x++;
				result.push_back({i,j});
			}
		}
	}
	cout<<x<<endl;
	for(int i=0;i<(int)result.size();i++){
		cout<<result[i].first<<" "<<result[i].second<<endl;
	}
}