#include <iostream>
 
using namespace std;
 
int main()
{
    int l,n,ile;
    cin >> ile;
    for ( int m=0; m<ile; m++)
    {
    cin >> l >> n;
    int **tab=new int*[n];
    int **tab_pom=new int*[n];
    for (int b=0; b<l; b++)
    {
    for (int a=0; a<n; a++)
    {
    tab[b]=new int[a];
    tab_pom[b]=new int[a];
    }
    }
 
    for(int g=0; g<l; g++)
    {
    for (int h=0; h<n; h++)
    {
    cin >> tab[g][h];
    }
    }
    for (int d=0; d<l; d++)
    {
    for (int e=0; e<n; e++)
        {
            if (d>0 && d<l-1 && e>0 && e<n-1 )
            {
            tab_pom[d][e]=tab[d][e];
            }
            if (d==0 && e<n-1)
            {
            tab_pom[d][e]=tab[d][e+1];
            }
            if(e==n-1 && d<l-1)
            {
            tab_pom[d][e]=tab[d+1][e];
            }
            if(d>0 && e==0 )
            {
            tab_pom[d][e]=tab[d-1][e];
            }
            if(d==l-1 && e>0)
            {
            tab_pom[d][e]=tab[d][e-1];
            }
        }
    }
    cout << endl;
    for(int i=0; i<l; i++)
    {
    for (int j=0; j<n; j++)
    {
    cout<< tab_pom[i][j] << " ";
    }
    cout << endl;
    }
 
}
    return 0;
}
 

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3
3 3
1 2 3
4 5 6 
7 8 9

3 5
1 2 3 4 5 
6 7 8 9 0
1 2 3 4 5

10 15
1 2 3 4 5 6 7 8 9 0 1 2 3 4 1
2 2 3 4 5 6 7 8 9 0 1 2 3 4 2
3 2 3 4 5 6 7 8 9 0 1 2 3 4 3
4 2 3 4 5 6 7 8 9 0 1 2 3 4 4
5 2 3 4 5 6 7 8 9 0 1 2 3 4 5
6 2 3 4 5 6 7 8 9 0 1 2 3 4 6
7 2 3 4 5 6 7 8 9 0 1 2 3 4 7
8 2 3 4 5 6 7 8 9 0 1 2 3 4 8
9 2 3 4 5 6 7 8 9 0 1 2 3 4 9
0 2 3 4 5 6 7 8 9 0 1 2 3 4 0