#include<bits/stdc++.h>

using namespace std;

int main(){
    int n,m;
    int arr[110][110]={0};
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>arr[i][j];
        }
    }
    for(int i=2;i<=n-1;i++){
        for(int j=2;j<=m-1;j++){
            if(arr[i][j]>arr[i-1][j]&&arr[i][j]>arr[i+1][j]&&arr[i][j]>arr[i][j-1]&&arr[i][j]>arr[i][j+1]){
                cout<<arr[i][j]<<endl;
            }
        }
    }
    return 0;
}