#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