#include <bits/stdc++.h>

using namespace std;

int main() {
    int i, j;
    int line = 0;
    scanf("%d", &line);
    line--;
    for (i = 0; i <= 2 * line; i++) {
        for (j = 0; j <= line; j++) {
            if (i <= line) {
                if (i + j >= line)
                    printf("* ");
                else
                    printf("  ");
            } else {
                if (i - j <= line)
                    printf("* ");
                else
                    printf("  ");
            }
        }
        printf("\n");
    }
    return 0;
}