#include <iostream>
using namespace std;

int main() {
    int N;
    cin >> N;

    for (int i = 1; i <= N; i++) {
        // 打印左边的空格
        for (int j = 1; j <= N - i; j++) {
            cout << " ";
        }
        // 打印左边的星号
        for (int k = 1; k <= 2 * i - 1; k++) {
            cout << "*";
        }
        // 打印中间的空格
        for (int j = 1; j <= 2 * (N - i); j++) {
            cout << " ";
        }
        // 打印中间的星号
        for (int k = 1; k <= 2 * i - 1; k++) {
            cout << "*";
        }
        // 打印右边的空格
        for (int j = 1; j <= 2 * (N - i); j++) {
            cout << " ";
        }
        // 打印右边的星号
        for (int k = 1; k <= 2 * i - 1; k++) {
            cout << "*";
        }
        cout << endl;
    }
    return 0;
}    
/**************************************************************
	Problem: 1006
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/