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

//int Yuki3027()
int main()
{
int N;

	cin >> N;

	if( N == 1 )
		cout << 7 << endl;
	else if( N == 2 )
		cout << 7 << endl;
	else if( N == 3 )
		cout << 7 << endl;
	else if( N == 4 )
		cout << 7 << endl;
	else if( N == 5 )
		cout << 5 << endl;
	else if( N == 6 )
		cout << 5 << endl;
	else if( N == 7 )
		cout << 5 << endl;
	else if( N == 8 )
		cout << 5 << endl;
	else if( N == 9 )
		cout << 5 << endl;
	else if( N == 10 )
		cout << 5 << endl;

	return 0;
}