#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;	

}

return 0;

}