#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    for(int i=1;i<=n/2+1;i++){
        for(int j=1;j<=i-1;j++)  cout<<" ";
        for(int j=1;j<=n+2-2*i;j++)  {
            if(j==1||j==n+2-2*i)  cout<<"X";
            else  cout<<" ";
        }
        cout<<endl;
    }
    for(int i=n/2;i>=1;i--){
        for(int j=1;j<=i-1;j++)  cout<<" ";
        for(int j=1;j<=n+2-2*i;j++) {
            if(j==1||j==n+2-2*i)  cout<<"X";
            else  cout<<" ";
        }
        cout<<endl;
    }
     
    return 0;
}
/**************************************************************
	Problem: 1239
	User: wangyousi
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/