#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    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;
}
//i==j || i+j==n+1

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	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;
}