#include<bits/stdc++.h>
using namespace std;
int main(){
  int i,m,n,j;
  int a[10][10];
  cin>>n>>m;
  for(i=0;i<n;i++)
  	for(j=0;j<m;j++) cin>>a[i][j];
  for(i=0;i<n;i++){
  for(j=0;j<m;j++){
  if(a[i][j]>a[i-1][j]&&a[i][j]>a[i][j-1]&&a[i][j]>a[i][j+1]&&a[i][j]>a[i+1][j])
  cout<<a[i][j]<<endl;
  }	
  }
return 0;
}
/**************************************************************
	Problem: 1384
	User: wtq001
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/