#include<bits/stdc++.h>
using namespace std;
int main()
{
	int i,n,j,k,o=1,u=0;
	cin>>n; 
	k=n;
	for(i=1;i<=n/2;i++){
		for(j=1;j<=u;j++){
			cout<<" ";
		}
			cout<<"X";
		for(j=1;j<=n-(o*2)-(u*2);j++){
			cout<<" ";
		}
			cout<<"X";
		for(j=1;j<=u*2;j++){
			cout<<" ";
		}
		u++;
		cout<<endl;
	}
	u=2;
	o=0;
	for(i=1;i<=n/2+1;i++){
		for(j=1;j<=u;j++){
			cout<<" ";
		}
			cout<<"X";
		for(j=1;j<=n-2-(u*2);j++){
			cout<<" ";
		}
		for(j=1;j<=o;j++)
			cout<<"X";
		for(j=1;j<=u*2;j++){
			cout<<" ";
		}
		u--;
		o=1;
		cout<<endl;
	}
return 0;

}

/**************************************************************
	Problem: 1239
	User: houshanglin
	Language: C++
	Result: Wrong Answer
****************************************************************/