#include<bits/stdc++.h>
 using namespace std;
 int make_wei(int x){
 	 int sum = 0;
 	 while(x != 0){
 	 	 x /= 10;
 	 	 sum ++;
	 }
 } 
 bool Lucky_num(int x){
 	 
 }
 int main( ){
 	 cout << 4;
 	 return 0;
 }