import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        if(sc.hasNext()){
            String input = sc.nextLine();
            String[] words = input.split(" ");
            System.out.println(words[words.length-1].length());
        }else{
            System.out.println("请输入字符串");
        }
        
    }
}