#include <iostream>
#include <cmath>
using namespace std;

int main(){
	int n,i,j;
	cin>>n;
	for(i=1;i<=n/2;i++){
		for(j=1;j<=i-1;j++){
			cout<<" ";
		}
		cout<<"X";
		for(j=1;j<=n-i-i;j++){
			cout<<" ";
		}
		cout<<"X"<<endl;
	}
	for(j=1;j<=n/2;j++){
		cout<<" ";
	}
	cout<<"X"<<endl;
	for(i=n/2;i>=1;i--){
		for(j=1;j<=i-1;j++){
			cout<<" ";
		}
		cout<<"X";
		for(j=1;j<=n-i-i;j++){
			cout<<" ";
		}
		cout<<"X"<<endl;
	}
}

/**************************************************************
	Problem: 1239
	User: admin
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/