#include<bits/stdc++.h>
using namespace std;
int main(){
    int a[100][100],n,m,i,j;
    cin>>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: wengsihan
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/