#include<stdio.h>
int main()
{
	int n,m;
	scanf("%d %d",&n,&m);
	int i,j,a[n][m];
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			scanf("%d",&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][j-1]&&a[i][j]>a[i][j+1]&&a[i][j]>a[i+1][j]){
				printf("%d\n",a[i][j]);
			} 
		} 
	}
	return 0;
}
/**************************************************************
	Problem: 1384
	User: admin
	Language: C
	Result: Accepted
	Time:10 ms
	Memory:1144 kb
****************************************************************/