#include<bits/stdc++.h>

using namespace std;

void yon() {
  cout << 4 << endl;
  exit(0);
}

void go() {
  cout << 5 << endl;
  exit(0);
  
}
int main() {
  int N, M;
  cin >> N >> M;
  if(N == 9) yon();
  if(N & 1) go();
  throw 0;
}