#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: mc002
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/