#include <bits/stdc++.h>
using namespace std;

int main() {
	cout<<"请输入一个正整数"<<endl;
	int a,b;
	cin>>a;
	b=a+3;
	for(int i=4;i<=b;i++){
		cout<<"H";
		for(int j=1;j<=i;j++){
				cout<<"X";
		}
		cout<<"H"<<endl;
		cout<<" "<<endl;		
	}
    return 0;
}