/*
Input:
2 2
3 -1
2 4

Output:
-1 2

Explanation:
-1 is smaller than 2, 3 & 4
2 is smaller than 3 & 4

Solution:
*/
#include <stdio.h>
int main(){
    int n,m,i,j,mat[100][100],max;
    scanf("%d%d", &n, &m);
        for(i=0;i<n;++i)
           for(j=0;j<m;++j)
            scanf("%d", &mat[i][j]);
        printf("\n");
    for(i=0;i<n;++i){
            int x1,x2,x3,x4;
           for(j=0;j<m;++j){
                if((i-1) >= 0)
               x1 = mat[i-1][j];
               else x1=9999;
            if((i+1) < m)
                x2 = mat[i+1][j];
            else x2=9999;
            if((j-1) >= 0)
                x3 = mat[i][j-1];
            else x3=9999;
            if((j+1) < n)
                x4 = mat[i][j+1];
            else x4=9999;
     //printf("%d %d %d %d  - %d\n", x1,x2,x3,x4,mat[i][j]);
     if(mat[i][j]<x1 && mat[i][j]<x2 && mat[i][j]<x3 && mat[i][j]<x4)
           printf("%d ", mat[i][j]);
           }
    }

return 0;
}