#include<bits/stdc++.h>
using namespace std;
int main()
{
	int i,j,n;
	cin>>n;
	for(i=1;i<=n;i++) {
		for(j=1;j<=n-i;j++) cout<<" ";
		for(j=1;j<=2*i-1;j++) 
			{if(j==1||j==2*i-1||i==n){
				cout<<"x";
			} 
			else  cout<<" ";
			}
		cout<<endl;
	}


	return 0;
}

/**************************************************************
	Problem: 1225
	User: hbq
	Language: C++
	Result: Wrong Answer
****************************************************************/