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

int main()
{
    int size,numberOfIteration;
    int count;
    int iteration,row,column;
    int index;
    scanf("%d",&size);
    scanf("%d",&numberOfIteration);
    char tab1[size][size];
    char tab2[size][size];
    /*for(index = 0; index < size; index++)
    {
        scanf("%s",tab1[index]);
    }*/
    for( row = 0; row < size; row++)
    {
        for( column = 0; column < size; column++)
        {
            scanf("%c",tab1[row][column]);
        }
    }

    printf("\n");
    for( iteration = 0; iteration < numberOfIteration; iteration++)
    {
        for( row = 0; row < size; row++)
        {
            for( column = 0; column < size; column++)
            {
                count = 0;

                if(tab1[row-1][column-1] == '*' && row>0 && column>0 )
                {
                    count++;
                }
                if(tab1[row-1][column] == '*'&&row>0)
                {
                    count++;
                }
                if(tab1[row-1][column+1] == '*'&& row>0&&column+1<size)
                {
                    count++;
                }
                if(tab1[row][column-1] == '*'&&column>0)
                {
                    count++;
                }
                if(tab1[row][column+1] == '*'&&column+1<size)
                {
                    count++;
                }
                if(tab1[row+1][column-1] == '*'&&row+1<size)
                {
                    count++;
                }
                if(tab1[row+1][column] == '*'&&row+1<size)
                {
                    count++;
                }
                if(tab1[row+1][column+1] == '*'&&row+1<size&&column+1<size)
                {
                    count++;
                }
                if(tab1[row][column] == '*')
                {
                    if(count == 2||count == 3)
                        tab2[row][column] = '*';
                    else
                        tab2[row][column] = '.';
                }
                else
                {
                    if(count == 3)
                        tab2[row][column] = '*';
                    else
                        tab2[row][column] = '.';
                }
            }

        }
        int temp = sizeof(char)*(size+1);
        for(index=0; index<size; ++index)
        {
            strncpy(tab1[index],tab2[index],temp);
        }
    }
    for( row = 0; row < size; row++)
    {
        for( column = 0; column < size; column++)
        {
            printf("%c",tab1[row][column]);
        }
        printf("\n");
    }
    return 0;
}