#include<bits/stdc++.h>
using namespace std;
int main(){
	int i,j,n,m,b;
	cin>>n>>m;
	int a[n][m];
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			cin>>a[i][j];
		}
	}
	for(i=1;i<n-1;i++){
		for(j=1;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]>a[i][j-1]){
				cout<<a[i][j]<<endl;
			}
		}
	}
}

/**************************************************************
	Problem: 1384
	User: wuzhijing
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/