#include <iostream>
#include <iomanip>
#include <cstring>
#include <cstdio>
#include <ctime>
#include <cmath>
using namespace std;
int main(){
	int a,b;
	cin >>a>>b;
	return 0;
}
//https://search.bilibili.com/all?vt=25685816&keyword=minecraft%E7%BD%91%E9%A1%B5%E7%89%88%E6%95%99%E7%A8%8B