#include<bits/stdc++.h>
using namespace std;
int a,s;
int n[500][200];
int main(){
	cin>>a>>s;
	for(int i=1;i<=a;i++){
		for(int j=1;j<=s;j++){
			cin>>n[i][j]; 
		}
	}
	for(int i=2;i<=a;i++){
		for(int j=2;j<=s;j++){
		if(n[i][j]>n[i-1][j]&&n[i][j]>[i+1][j]&&n[i][j-1]>n[i][j]&&n[i][j+1])
		cout<<n[i][j]<<endl;
		} 
	}

}

/**************************************************************
	Problem: 1384
	User: lidongbo
	Language: C++
	Result: Compile Error
****************************************************************/