using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		
		N=0;
		if(S.Length<10)N=long.Parse(S);
		int ans=0;
		switch(N){
			case 4:	ans=3;break;
			case 6:	ans=5;break;
			case 8:	ans=7;break;
			case 9:	ans=7;break;
			case 10:	ans=7;break;
			case 15:	ans=7;break;
			case 16:	ans=7;break;
			case 22:	ans=7;break;
			default:	ans=8;break;
		}
		Console.WriteLine(ans);
		
		
		
		
	}
	String S;
	long N;
	public Sol(){
		S=rs();
	}




	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(){return Console.ReadLine().Split(' ');}
	static int[] ria(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>int.Parse(e));}
	static long[] rla(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>long.Parse(e));}
	static double[] rda(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>double.Parse(e));}
}