#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
    int m,n;
    int count,p,k,i;
    int f;
    scanf("%d",&m);
    scanf("%d",&n);
    char tab1[m][m];
    char tab2[m][m];
    for(f = 0; f < m; f++)
    {
        scanf("%s",tab1[f]);
    }
    for( p = 0; p < n; p++)
    {
        for( k = 0; k < m; k++)
        {
            for( i = 0; i < m; i++)
            {
                if(tab1[k-1][i-1] == '*')
                    count++;
                if(tab1[k-1][i] == '*')
                    count++;
                if(tab1[k-1][i+1] == '*')
                    count++;
                if(tab1[k][i-1] == '*')
                    count++;
                if(tab1[k][i] == '*')
                    count++;
                if(tab1[k][i+1] == '*')
                    count++;
                if(tab1[k+1][i-1] == '*')
                    count++;
                if(tab1[k+1][i] == '*')
                    count++;
                if(tab1[k+1][i+1] == '*')
                    count++;
                if(count == 2||count == 3)
                    tab2[k][i] = '*';
                else
                    tab2[k][i] = '.';
            }
        }
        int size = sizeof(char)*(m+1);
        for(i=0; i<m; ++i)
        {
            strncpy(tab1[i],tab2[i],size);
        }
    }
    for( k = 0; k < m; k++)
    {
        for( i = 0; i < m; i++)
        {
            printf("%c",tab1[k][i]);
        }
        printf("\n");
    }
    return 0;
}