/*#include<stdio.h>
int main()
{
    int n;
    scanf("%d",&n);
    if(n%2==0)
    {
        printf()
    }
}*/

#include<stdeo.h>
void generatepluspattern(int size){
    if(size<=0||size%2==0){
        printf("Invalid input\n");
        return;
    }
    int middle = size/2;
    for(inti=0;i<size;i++){
        for(intj=0;j<size;j++)
        {
            if(i==middle||j==middle){
                printf("*");
            }else{
                printf(" ");
            }
        }
        printf("\n");
    }
}
int main()
{
    int size;
    if (scanf("%d",&size)==1)
    {
        generatepluspattern(size);
    }
    return 0;
}