#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin >> n;
    
    for (int i=1;i<=n;i++) {
        for (int j=1;j<=n;j++) {
            if (i==j||i+j==n+1) {
                cout<<"X";
            }else{
            cout<<" ";
            }
        }
        cout<<endl;
    }
    
    return 0;
}
/**************************************************************
	Problem: 1239
	User: sf751616
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/