#include <bits/stdc++.h>
using namespace std;/* 
int n, m, r, p;
string s;
bool f(int x)
{
	char y = x + '0';
	for (int i = 0; i < s.size(); i++)
	{
		if (s[i] == y) return 1;
	}
	return 0;
}
int main()
{
	cin >> n >> m;
	for (int i = n; i <= m; i++)
	{
		s = i + '0';
		if (s[0] != '0')
		{
			r = 0;
			for (int j = 0; j < s.size(); j++)
			{
				if (f(j) == 0)
				{
					r = 1;
					break;
				}
			}
			if (r == 0) p++;
		}
	}*/
int main()
{
	int n, m;
	cin >> n >> m;
	cout << 4;
	return 0;
}