#include<bits/stdc++.h>
using namespace std;
int main()
{
	int i,n,k,j,o=1;
	cin>>n;
	k=i+(n-1)*2;
	for(i=3;i>=1;i--){
		for(j=1;j<=i-1;j++)
		cout<<"*";
		for(j=1;j<=o;j++)
		cout<<"@";
		for(j=1;j<=i-1;j++)
		cout<<"*";
		o+=2;
		cout<<endl;
	}
return 0;

}

/**************************************************************
	Problem: 1494
	User: houshanglin
	Language: C++
	Result: Wrong Answer
****************************************************************/