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

public class Main{
    public static void main(String args[]) throws IOException{
        BufferedReader bfr=new BufferedReader(new InputStreamReader(System.in));
        String[] str=bfr.readLine().split(" ");
        
        Main main=new Main();    
        System.out.println(main.panduan(str));
    }
    
    
    public int panduan(String[] str){
        if(str.length<0||str.length==0)
            return 0;
        if(str.length==1)
            return str[0].length();
        
        return str[str.length-1].length();
    }
}