#define _CRT_SECURE_NO_WARNINGS
#include "bits/stdc++.h"
#define rep(i,n) for(int i = 0;i < n;i++)
#define P(p) cout<<(p)<<endl;
using namespace std;
typedef long long ll;
int dx[] = { 0, 1, 0, -1 };
int dy[] = { -1, 0, 1, 0 };

int sttoi(std::string str) {
	int ret;
	std::stringstream ss; ss << str;
	ss >> ret;
	return ret;
}

ll gcd(ll a, ll b){
	if (b > a)swap(a, b); if (b == 0)return a; else{ return gcd(b, a%b); }
}

void solve() {
	string s;
	cin >> s;
	unsigned long long A;
	if (s.length() <= 2){
		int n = sttoi(s);
		if (n == 4 || n == 5 || n == 7){
			P(3);
		}
		else if (n == 6 || n == 11){
			P(5);
		}
		else if (n == 8 || n == 9 || n == 10 || n == 15 || n == 16 || n == 17 || n == 22 || n == 23 || n == 29){
			P(7);
		}
		else{
			P(8);
		}
	}
	else if (s.length() <= 19){
		A = sttoi(s);
		if (A % 8 == 1 && (A / 8) % 2 == 0){
			P(14);
		}
		else{
			P(8);
		}
	}
	else{
		int last2 = sttoi("" + s[s.length() - 2] + s[s.length() - 1]);
		if (last2 % 8 == 1){
			P(14);
		}
		else{
			P(8);
		}
	}
}

int main() {
	solve();
	return 0;
}