#include<bits/stdc++.h>
using namespace std;
int main(){
    int a[1001][1001],n,m,t,x1[1001],x2[1001],y1[1001],y2[1001],s,sum;
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>a[i][j];
    }}
    cin>>t;
    if(t==0){
    }else{
        for(int i=1;i<=t;i++){
        cin>>x1[i]>>y1[i]>>x2[i]>>y2[i];
        s=a[x1[i]][y1[i]];
        a[x1[i]][y1[i]]=a[x2[i]][y2[i]];
        a[x2[i]][y2[i]]=s;
    }}
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(a[i][j]>=3){
                sum++;
            }
    }}
    cout<<sum<<endl;;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(a[i][j]>=3){
                cout<<i<<" "<<j<<endl;
            }
    }}
}