/*
#include <stdio.h>
int main()
{
long long int a,r,n,i;
scanf("%lld %lld %lld",&a,&r,&n);
for(i=0;i<n-1;i++){
a*=r;
}
printf("%lld",a);
return 0;
}
*/
/*
int main(){
int i, j, n;
scanf("%d", &n);
for(i=0; i<n; i++){
for(j=0; j<n; j++) {
printf("(%d,%d)\t", i, j);
}
printf("\n");
}
}
*/
/*
#include <stdio.h>
int main()
{
int i,j,a;
scanf("%d",&a);
for(i=0;i<a;i++){
for(j=0;j<a;j++){
printf("*");
}
printf("\n");
}
}
*/
/*
#include <stdio.h>
int main()
{
int i,j,a;
scanf("%d",&a);
for(i=0;i<a;i++){
for(j=0;j<a;j++){
if(i==0||j==0||i==a-1||j==a-1){
printf("*");
}
else{
printf(" ");
}
}
printf("\n");
}
}
*/
/*
#include <stdio.h>
int main()
{
int i,j,a;
scanf("%d",&a);
for(i=0;i<a;i++){
for(j=0;j<a;j++){
if(i==0||j==0||i==a-1||j==a-1||i==j||i+j==a-1){
printf("*");
}
else{
printf(" ");
}
}
printf("\n");
}
}
*/
/*
#include <stdio.h>
int main()
{
int i,j,a;
scanf("%d",&a);
for(i=0;i<a;i++){
for(j=0;j<a;j++){
if(i==0||j==0||i==a-1||j==a-1||i==j||i+j==a-1||i==a/2||j==a/2){
printf("*");
}
else{
printf(" ");
}
}
printf("\n");
}
}
*/
#include <stdio.h>
int main()
{
int k,n,i,j;
scanf("%d %d",&n,&k);
for(i=0;i<n;i++){
for(j=0;j<n;j++){
if(i==0||j==0||i==n-1||j==n-1||(i+j+1)%k==0){
printf("*");
}
else{
printf(" ");
}
}
printf("\n");
}
}
/*
(0,0) (0,1) (0,2) (0,3) (0,4) (0,5) (0,6) (0,7) (0,8) (0,9)
(1,0) (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (1,7) (1,8) (1,9)
(2,0) (2,1) (2,2) (2,3) (2,4) (2,5) (2,6) (2,7) (2,8) (2,9)
(3,0) (3,1) (3,2) (3,3) (3,4) (3,5) (3,6) (3,7) (3,8) (3,9)
(4,0) (4,1) (4,2) (4,3) (4,4) (4,5) (4,6) (4,7) (4,8) (4,9)
(5,0) (5,1) (5,2) (5,3) (5,4) (5,5) (5,6) (5,7) (5,8) (5,9)
(6,0) (6,1) (6,2) (6,3) (6,4) (6,5) (6,6) (6,7) (6,8) (6,9)
(7,0) (7,1) (7,2) (7,3) (7,4) (7,5) (7,6) (7,7) (7,8) (7,9)
(8,0) (8,1) (8,2) (8,3) (8,4) (8,5) (8,6) (8,7) (8,8) (8,9)
(9,0) (9,1) (9,2) (9,3) (9,4) (9,5) (9,6) (9,7) (9,8) (9,9)
*/