#include<bits/stdc++.h>

using namespace std;

int main()

{

int n,o;

cin>>n;

o=n/2+1;

for(int i=1;i<=o;i++)

{

for(int h=1;h<=i-1;h++)

cout<<" ";

if(i==o)

{

cout<<"X";

}

else

{

cout<<"X";

for(int h=1;h<=(o-i)*2-1;h++)

cout<<" ";

cout<<"X";

}

cout<<endl;

}

for(int i=1;i<=n-o;i++)

{

for(int h=1;h<=n-o-i;h++)

cout<<" ";

cout<<"X";

for(int h=1;h<=(n-o+i-n/2)*2-1;h++)

cout<<" ";

cout<<"X";

cout<<endl;

}

return 0;

}