#include<bits/stdc++.h>
using namespace std;
int n,a[200][200],m;
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]>a[i][j+1])) cout<<a[i][j]<<endl;
		}
	}

	return 0;
}

/**************************************************************
	Problem: 1384
	User: wuzihang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2228 kb
****************************************************************/