#include<bits/stdc++.h>
using namespace std;
int main()
{
	int i,n,j,k,o=3,u=0;
	cin>>n; 
	k=n/2+1;
	for(i=1;i<=k-1;i++){
		for(j=1;j<=i-1;j++){
			cout<<" ";
		}
		for(j=1;j<=2*(k-i)+1;j++){
			if(j==1||j==2*(k-i)+1)
			cout<<"X";
			else
			cout<<" ";
		}
		cout<<endl;
	}
	for(i=1;i<=k;i++){
		for(j=1;j<=k-i;j++){
			cout<<" ";
		}
		for(j=1;j<=2*i-1;j++){
			if(j==1||j==2*i-1)
			cout<<"X";
			else
			cout<<" ";
		}
		cout<<endl;
	}
return 0;

}
/**************************************************************
	Problem: 1239
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/