#include<bits/stdc++.h>
using namespace std;
int n,m,a[1000][1000]; 
int main(){
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++) {
			cin>>a[i][j];
		}
	}
	for(int i=2;i<=n-1;i++){
		for(int j=2;j<=m-1;j++){
			if(a[i][j]>a[i-1][j]&&a[i][j]>a[i+1][j]&&a[i][j]>a[i][j-1]&&a[i][j+1])
			cout<<a[i][j]<<endl;
		}
	
	
}
}
/**************************************************************
	Problem: 1384
	User: chenxuanyi
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:5980 kb
****************************************************************/