import java.util.Scanner;

/**
 * HJ001 字符串最后一个单词的长度 - 简单
 */
public class HJ001 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        String[] s1 = s.split(" ");
        System.out.println(s1[s1.length-1].length());
        sc.close();
    }
}