#include<bits/stdc++.h>
using namespace std;
int n;
int main(){
    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: lidongbo
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/