import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		StringTokenizer st = new StringTokenizer("12.345.6789", ".");
		List<String> numeros = new ArrayList<String>();
		while(st.hasMoreTokens()){
			numeros.add(st.nextToken());
        }
        System.out.println(numeros.get(0).length());
	}
}